February 1991 v.42 n.1
Cover: Superimposed on a photograph of the optical modulator are a simulated light beam (blue) and microwave energy (yellow) interacting in the modulator (green region) to produce a modulated light beam, represented by a wavy blue line.
High-Speed Lightwave Component Analysis to 20 GHz. A new family of instruments – analyzer, test set, sources, receivers, and modulator – characterizes electrical, electrooptical, and optical components of fiber optic communications systems at modulation rates to 20 GHz, by Daniel R. Harkins, Paul R. Hernday, Roger W. Wong, pg 6-13. 8703A, 83420A, 83421A, 83422A, 83423A, 83424A, 83425A.
Design of a 20-GHz Lightwave Component Analyzer. The HP 8703A is a fully integrated and calibrated instrument for lightwave component characterization. It offers a choice of wavelengths and laser types, both internal and external, by Paul R. Hernday, Geraldine A. Conrad, Michael G. Hart, Rollin F. Rawson, pg 13-22. 8703A.
Measurement Capabilities of the HP 8703A Lightwave Component Analyzer and the HP 71400C Lightwave Signal Analyzer, by Jack Dupre, Roger Wong, pg 17-18
20-GHz Lightwave Test Set and Accessories. With this lightwave test set and a compatible HP microwave network analyzer, users have the same key 20-GHz lightwave component analysis capabilities as with the integrated HP 8703A analyzer. The microwave network analyzer can still be used for its normal functions, by Joel P. Dunsmore, John V. Vallelunga, pg 23-33. 83420A.
Accuracy Considerations and Error Correction Techniques for 20-GHz Lightwave Component Analysis. An understanding of factory calibration techniques, system capabilities, and device-under-test sensitivities can result in more accurate and repeatable measurements using the HP 8703A lightwave component analyzer, by Daniel R. Harkins, Michael A. Heinzelman, pg 34-40
Development of an Optical Modulator for a High-Speed Lightwave Component Analyzer. The design and characterization of the first integrated optic modulator for commercial instrument application are described, including the advantages of titanium-in-diffused lithium niobate, device geometries for both phase modulators and Mach-Zehnder intensity modulators, stability considerations including bias drift and acoustic resonances, wavelength sensitivity, packaging and pigtailing, reliability and testing, by David J. McQuate, Roger L. Jungerman, pg 41-45. 8703A.
A High-Performance Optical Isolator for Lightwave Systems. This compact, rugged, two-stage design uses birefringent rutile crystals and Bi-YIG films to achieve high isolation, low insertion loss, high return loss, and polarization independence, by Harry Chou, Kok-Wai Chang, Siegmar Schmidt, Wayne V. Sorin, Jimmie L. Yarnell, Steven A. Newton, pg 45-50
A Broadband, General-Purpose Instrumentation Lightwave Converter. Converting lightwave signals with wavelengths of 1200 to 1600 nanometers to electrical signals, this device serves as an optical front end for spectrum analyzers, network analyzers, bit error rate testers, and oscilloscopes, by Christopher M. Miller, Roberto A. Collins, pg 51-57. 11982A.
A Lightwave Multimeter for Basic Fiber Optic Measurements. This new instrument can replace separate optical power meters, dedicated loss test sets, and stable light sources for measurements of absolute power, relative power, and loss, by Bernd Maisenbacher, Wolfgang Reichert, pg 58-63. 8153A.
Design of a Series of High-Performance Lightwave Power Sensor Modules. The power sensor modules for the HP 8153A lightwave multimeter feature a new optical interface, new detectors, an analog-to-digital converter based on a voltage-to-frequency converter, and a custom gate array. They offer excellent absolute accuracy and fast autoranging, by Jochen Rivoir, Emmerich Muller, Horst Schweikardt, pg 63-69
Calibration of Fiber Optic Power Meters. This paper describes the proposed IEC standard and HP’s implementation, by Christian Hentschel, pg 70-72
Semiconductor Laser Sources with Superior Stability for Optical Loss Measurements. Temperature stabilization and output power control provide excellent stability in the plug-in laser source modules for the HP 8153A lightwave multimeter, by Frank A. Maier, pg 73-76
Lightwave Multimeter Firmware Design. Flexibility and modularity were challenges in the firmware development of the HP 8153A lightwave multimeter. Built-in applications software automates many commonly needed measurements, by Wilfried Pless, Michael Pott, Robert Jahn, pg 77-83
Authors February 1991: Roger W. Wong, Paul R. Hernday, Michael [Mike] G. Hart, Rollin [Fred] F. Rawson, Geraldine [Gerry] A. Conrad, Joel P. Dunsmore, John V. Vallelunga, Daniel [Dan] R. Harkins, Michael [Mike] A. Heinzelman, David [Dave] J. McQuate, Roger L. Jungerman, Kok-Wai Chang, Siegmar Schmidt, Wayne V. Sorin, Jimmie L. Yarnell, Harry Chou, Steven [Steve] A. Newton, Christopher [Chris] M. Miller, Roberto A. Collins, Bernd Maisenbacher, Wolfgang Reichert, Jochen Rivoir, Horst Schweikardt, Emmerich Muller, Christian Hentschel, Frank A. Maier, Wilfried Pless, Michael Pott, Robert Jahn, Mark W. Champine, pg 84-87
A Visual User Interface for the HP-UX and Domain Operating Systems. This graphical user interface provides a friendly and pleasant front end for the HP-UX and Domain operating systems. It makes these subsystems less intimidating for new users and at the same time provides features that appeal to experienced users, by Mark A. Champine, pg 88-99
Open Dialogue, pg 93
HP Visual User Interface, Version 2.0, by David A. Williams, pg 97-98
April 1991 v.42 n.2
Cover: In the background is a photomicrograph of a microwave monolithic integrated circuit. In the foreground are examples of thick-film and thin-film microwave hybrid microcircuits, waveguide components, and various amplifier, multiplier and modulator microcircuit assemblies
A Family of High-Performance Synthesized Sweepers. Eleven models offer frequency coverage to 50 GHz in coax, extendable to 100 GHz in waveguide with millimeter heads. Swept frequency accuracy is ten times better than previous designs. A menu-based user interface simplifies operation, by James E. Bossaller, Roger P. Oblad, John R. Regazzi, pg 6-16. 8360.
Designing for Low Cost of Ownership, by James R. Stead, pg 10-11
Strife Testing the Alphanumeric Display, by James R. Stead, pg 13
Front Panel Designed for Manufacturability, by James E. Bossaller, pg 15
Built-in Synthesized Sweeper Self-Test and Adjustments. A combination of hardware features and firmware routines makes it possible to isolate most failures to the assembly level and make many adjustments without external test equipment, by Michael J. Seibel, pg 17-23. 8360.
Automatic Frequency Span Calibration, pg 19
Accessing a Power Meter for Calibration, pg 22
A High-Performance Sweeper Output Power Leveling System. A feedforward ALC design gives HP 8360 sweepers improved flatness, power accuracy, and modulation performance. Factory calibration techniques minimize measurement errors so as not to degrade the improved specifications, by Glen M. Baker, Mark N. Davidson, Lance E. Haag, pg 24-30
Mismatch Error Calculation for Relative Power Measurements with Changing Source Match, pg 28-29
A 0.01-to-40-GHz Switched Frequency Doubler. This microcircuit doubler has a passthrough mode for 0.01 to-20-GHz input signals and a doubler mode for 20 to 40 GHz. An integrated RF switch changes modes. Slotline filters reduce spurious outputs to -40dBc or less, by James R. Zellers, pg 31-33. 8630.
A High-Speed Microwave Pulse Modulator. This optional fast pulse modulator uses an unequally spaced diode topology to achieve a wide bandwidth and a high on-off ratio without resorting to performance-limiting diode saturation, by Mary K. Koenig, pg 34-36. 8360.
New Technology in Synthesized Sweeper Microcircuits. A new packaging technology using thick-film hybrids and contacts integral to the package simplifies testing and rework and reduces RFI. New circuit designs include a triple balanced mixer and quasi-elliptic low-pass filters. New approaches reduce video feedthrough and harmonic generation, by Ronald C. Blanc, Richard S. Bischof, Patrick B. Harper, pg 36-46. 8360.
Modular Microwave Breadboard System, by Stan Bischof, pg 41
Quasi-Elliptic Low-Pass Filters, by Stan Bischof, pg 44-45
DC-to-50-GHz Programmable Step Attenuators. Based on HP’s proven edgeline technology, these attenuators provide the HP 8360 sweepers with up to 90 dB of attenuation in 10-dB steps, by David R. Veteran, pg 47-49. 8360, 33324/26/27.
50-to-110-GHz High-Performance Millimeter-Wave Source Modules. State-of-the-art microcircuit technologies and development tools were employed to produce a W-band amplifier tripler, a V-band amplifier doubler, an R-band amplifier doubler, and a coupler detector for two new frequency multiplier modules, by Giovonnae F. Anderson, Mohamed M. Sayed, pg 50-64. 83557A, 83558A.
The Use of the HP Microwave Design System in the W-Band Tripler Design, by Giovonnae Anderson, pg 53-54
The Use of HP ME 10/30 in the W-Band Tripler Design, by Roy Marciulionis, pg 57
Flatness Correction, by Lon Dearden, pg 59
High-Power W-Band Source Module, by Mohamed Sayed, pg 61
An Instrument for Testing North American Digital Cellular Radios. The HP 11846A is designed to produce filtered p/4 DQPSK modulated I and Q baseband signals needed to test digital cellular radios, by David M. Hoover, pg 65-72. 11846A.
HP 11846A Filtering Technique, pg 71-72
Measuring the Modulation Accuracy of p/4 DQPSK Signals for Digital Cellular Transmitters. Using digital signal processing techniques, this software accurately verifies the RF performance of digital cellular transmitters conforming to the North American Dual-Mode Cellular System standard, by Raymond A. Birgenheier, pg 73-82 . 11847A.
A Test Verification Tool for C and C++ Programs. The HP Branch Validator provides an automated tool that enables software developers to test and verify the branch coverage of their modules as they are created, by David L. Neuder, pg 83-92
Authors April 1991: Roger P. Oblad, James [Jim] E. Bossaller, John R. Regazzi, Michael [Mike] J. Seibel, Lance E. Haag, Mark N. Davidson, Glen M. Baker, James [Jim] R. Zellers, Mary K. Koenig, Ronald [Ron] C. Blanc, Richard [Stan] S. Bischof, Patrick [Pat] B. Harper, David [Dave] R. Veteran, Mohamed M. Sayed, Giovonnae F. Anderson, David [Dave] M. Hoover, Raymond [Ray] A. Birgenheier, David [Dave] L. Neuder, pg 93-95
June 1991 v.42 n.3
Cover: Two HP 48SX scientific expandable calculators can use their infrared input/output link to exchange data and programs along with a serial RS-232 cable link to a personal computer.
HP 48SX Scientific Expandable Calculator: Innovation and Evolution. Many of the features of this advanced handheld calculator have evolved from its predecessors, the HP 41C and HP 28S. Others, such as its unit management system, are new, by William C. Wickes, Charles M. Patton, pg 6-12
The HP 48SX Interfaces and Applications. The HP 48SX scientific expandable calculator provides support for multiple applications, both built-in and externally developed, with customized user interfaces. The Equation-Writer and interactive plotting are two of the built-in applications, by Diana K. Byrne, Robert W. Jones, Patrick J. Megowan, Gabe L. Eisenstein, Ted W. Beers, pg 13-21
HP Solve Equation Library Application Card. The card contains a library of 315 equations, the periodic table of the elements, a constants library, a multiple equation solver, a finance application, and engineering utilities, by Eric L. Vogel, pg 22-25. 48SX.
Hardware Design of the HP 48SX Scientific Expandable Calculator. Leveraging an earlier design resulted in prototypes with 90% production tooled parts only nine months after the start of the project. The HP 48SX includes an 8-line-by-22 character super-twisted nematic liquid crystal display, two expansion ports for ROM or battery-backed RAM cards, and two I/O ports: RS-232 and infrared, by M. Jack Muranami, James P. Dickie, Preston D. Brown, Mark A. Smith, Lester S. Moore, Thomas B. Lindberg, David L. Smith, pg 25-34
Industrial Design of the HP 48SX Calculator, by Michael Derocher, pg 27-28
HP 48SX Custom Integrated Circuit, by Preston D. Brown, pg 30
Mechanical Design of the HP 48SX Memory Card and Memory Card Connector, by M. Jack Muranami, pg 32-33
The HP 48SX Calculator Input/Output System. An RS-232 link allows communication with personal computers. An infrared link provides for printing and for two-way calculator-to-calculator communication, by Steven L. Harper, Robert S. Worsley, pg 35-40
Manufacturing the HP 48SX Calculator. Sharing manufacturing processes with earlier, simpler calculators shortened development time and improves manufacturing efficiency. The HP 48SX and the simpler calculators also share the same production line at the same time – a concept known as coproduction, by Richard W. Riper, pg 40-43
A 10-Hz-to-150-MHz Spectrum Analyzer with a Digital IF Section. The HP 3588A’s digital resolution bandwidth filters offer better shape factors and can be swept four times faster than their analog counterparts. Narrowband zoom measurements using fast Fourier transform analysis can be hundreds of times faster. Extensive self-calibration, a help system with hypertext, and adaptive data acquisition also improve performance, by James H. Cauthorn, Kirsten C. Carlson, Roy L. Mason, Eric J. Wicklund, Jay M. Wardle, Timothy L. Hillstrom, Joseph F. Tarantino, pg 44-60
Spectrum Analyzer Self-Calibration, by Timothy L. Hillstrom, Joseph F. Tarantino, pg 47-48
Adaptive Data Acquisition, by James H. Cauthorn, pg 51
Help System with Hypertext, by Mark M. Smith, pg 53-54
User Interface Compiler, Bryan P. Murray, pg 57-58
Authors June 1991: William [Bill] C. Wickes, Charles M. Patton, Ted W. Beers, Diana K. Byrne, Robert [Max] W. Jones, Gabe L. Eisenstein, Patrick [Pat] J. Megowan, Eric L. Vogel, Mark A. Smith, Lester [Les] S. Moore, James [Jim] P. Dickle, Preston D. Brown, David [Dave] L. Smith, Thomas [Tom] B. Lindberg, M. Jack Muranami, Steven [Steve] L. Harper, Robert [Bob] S. Worsley, Richard [Rick] W. Riper, Eric J. Wicklund, Joseph [Joe] F. Tarantino, James [Jim] H. Cauthorn, Kirsten C. Carlson, Jay M. Wardle, Timothy [Tim] L. Hillstrom, Roy L. Mason, Rex Backman, Douglas [Doug] Daetz, William [Bill] P. Carmichael, Edith Wilson, Spencer B. Graves, David Lubkin, John W. Goodnow, Ronald [Ron] F. Richardson, pg 60-64
Easy-to-Use Performance Tools with a Consistent User Interface Across HP Operating Systems. By involving customers in the product development process and incorporating their feedback into the product, HP GlancePlus has eliminated the mystique commonly associated with performance tools. Exception-based reporting displays only the interesting data, by Rex A. Backman, pg 65-70
Design Prototyping for HP GlancePlus, by Joe Thomas, pg 69
The Performance Tool Quadrant, by Rex Backman, pg 70
Improving the Product Development Process. To define, design, and product products and services that will be successful in the marketplace, it’s necessary to understand the product development process and employ tools to measure and improve the process, by Douglas Daetz, William P. Carmichael, Edith Wilson, Spencer B. Graves, pg 71-76
DSEE: A Software Configuration Management Tool. HP Apollo provides a software tool that helps to manage development and maintenance of the many components that make up large-scale software systems, by David C. Lubkin, pg 77-83. Domain Software Engineering Environment.
A Mechanism to Support Parallel Development via RCS. HP’s Imaging Systems Division uses the HP-UX revision control system utility, RCS, to implement a configuration management system that allows stable, released software to remain unchanged while modifications are made to some of its components, by John W. Goodnow, pg 84-89
Building and Managing an Integrated Project Support Environment. HP’s Roseville Networks Division has developed an integrated, cost-effective computing environment that fosters cooperative computing and provides R&D engineers with easy access to the tools and methodologies for product development, by Ronald F. Richardson, pg 90-96. HP-UX.
October 1991 v.42 n.4
Cover: HP’s Component Monitoring System
Introduction to the HP Component Monitoring System. This fourth-generation patient monitoring system offers a set of hardware and software building blocks from which functional modules are assembled to tailor the system to the application and the patient, by Christoph Westerteicher, pg 6-10
Medical Expectations of Today’s Patient Monitors, by Frank Rochlitzer, pg 9
Component Monitoring System Hardware Architecture. Up to 23 function cards residing in a computer module communicate over a message passing bus. The computer module, the display, and the parameter modules that measure vital signs can be in separate locations as needed by the application, by Christoph Westerteicher, Werner E. Heim, pg 10-13
Component Monitoring System Software Architecture. A modular design leads to a complex but easily manageable system that ensures economical resource utilization, by Martin Reiche, pg 13-18
Component Monitoring System Software Development Environment, pg 15
Component Monitoring System Parameter Module Interface. This interface is the link between the component Monitoring System computer module and the patient parameter modules. It provides fast response, optimum use of the available bandwidth, configuration detection, and parameter module synchronization, by Winfried Kaiser, pg 19-21
Measuring the ECG Signal with a Mixed Analog-Digital Application-Specific IC. Putting the ECG data acquisition subsystem into a Component Monitoring System parameter module mandates high-density packaging and low power consumption, and was only possible by implementing major elements of the circuit in a large mixed analog-digital ASIC, by Wolfgang Grossbach, pg 21-24
A Very Small Noninvasive Blood Pressure Measurement Device. This small assembly covers the entire blood pressure measurement spectrum from neonates to adults. The packaging of the air pump assembly makes several contributions to the objectives, by Rainer Rometsch, pg 25-26
A Patient Monitor Two-Channel Stripchart Recorder. Small enough to fit in a double-width HP Component Monitoring System parameter module, this recorder embodies simplicity of design, a highly tooled mechanism, and sophisticated printhead power management, by Leslie Bank, pg 26-28
Patient Monitor Human Interface Design. A design based on human factors leads to an intuitive and easy-to-use human interface for the HP Component Monitoring System, by Gerhard Tivig, Wilhelm Meier, pg 29-36
Globalization Tools and Processes in the HP Component Monitoring System. Software design and localization are decoupled. All languages are treated in the same way. A database contains the text strings for all languages, and automated tools aid the translator, by Gerhard Tivig, pg 37-40
The Physiological Calculation Application in the HP Component Monitoring System. This application converts raw real-time data into derived values the clinician can use to assess the patient’s hemodynamic, oxgenation, and ventilatory condition, by Paul Johnson, Steven J. Weisner, pg 40-43
Mechanical Implementation of the HP Component Monitoring System. The part count and the number of different parts are dramatically lower than for previous designs. Fewer than ten vendors are used for purchased mechanical parts, by Erwin Flachslander, Karl Daumuller, pg 44-48
An Automated Test Environment for a Medical Patient Monitoring System. The AUTOTEST program controls a keypusher and patient simulators to automate the testing of the software for the HP Component Monitoring System, by Dieter Goring, pg 49-52
Production and Final Test of the HP Component Monitoring System. A vertically oriented material flow minimizes handling and simplifies customization. Automated final test systems minimize human errors and collect data for monitoring process quality, by Otto Schuster, Joachim Weller, pg 52-54
Calculating the Real Cost of Software Defects. Using data from a well-established software metrics database and an industry profit loss model, a method is developed that computes the real cost of dealing with software defects, by William T. Ward, pg 55-58
A Case Study of Code Inspections. The code inspection process is a tool that can be used early in the software development cycle to help improve the quality of software products and the productivity of development engineers, by Mark E. Boles, Frank W. Blakely, pg 58-63
Authors October 1991: Christoph [Chris] Westerteicher, Werner E. Heim, Martin Reiche, Winfried Kaiser, Wolfgang Grossbach, Rainer Rometsch, Leslie [Les] Bank, Gerhard Tivig, Wilhelm Meier, Steven [Steve] J. Weisner, Paul Johnson, Karl Daumuller, Erwin Flachslander, Dieter Goring, Otto Schuster, Joachim Weller, William [Jack] T. Ward, Frank W. Blakely, Mark E. Boles, Larry Shintaku, Michael [Mike] B. Raynham, Douglas [Doug] M. Thom, Marilyn J. Lang, Gary W. Lum, Thomas Tom, Irvin R. Jones, Jr., Christophe Grosthor, Viswanathan [Suri] S. Narayanan, Philip [Phil] Garcia, John D. Graf, David [Dave] W. Blevins, Christopher [Chris] A. Bartholomew, pg 64-68
The HP Vectra 486 Personal Computer. The HP Vectra 486 series of computers uses the Intel486Ô microprocessor, a custom-designed burst-mode memory controller, and the HP implementation of the Extended Industry Standard Architecture (EISA), by Larry Shintaku, pg 69-73
The HP Vectra 486 EISA SCSI Subsystem, by Mike Jerbic, pg 70
The HP Vectra 486/33T, by Mark Linsley, pg 72
The EISA Connector. Providing backward compatibility in the EISA connector hardware for ISA I/0 boards resulted in a bilevel connector design that provides pins for both bus standards in the same connector, by Douglas M. Thom, Michael B. Raynham, pg 73-77
EISA Configuration Software, by Tony Dowden, pg 75
The HP Vectra 486 Memory Controller. The memory subsystem architecture and the memory controller in the HP Vectra 486 personal computer provide a high-performance burst-mode capability, by Gary W. Lum, Marilyn J. Lang, pg 78-83
The HP Vectra 486 BASIC I/O System. An Intel486 processor, the EISA bus standard, and a new memory subsystem all required enhancements to the Basic I/0 System to ensure that the HP Vectra 486 made the best possible use of these new features, by Irvin R. Jones, Jr., Philip Garcia, Viswanathan S. Narayanan, Thomas Tom, Christophe Grosthor, pg 83-92
Performance Analysis of Personal Computer Workstations. The ability to analyze the performance of personal computers via noninvasive monitoring and simulation allows designers to make critical design trade offs before committing to hardware, by David W. Blevins, John D. Graf, Christopher A. Bartholomew, pg 92-96
December 1991 v.42 n.5
Cover: an artist’s rendition of a typical HP Sockets domain
HP Software Integration Sockets: A Tool for Linking Islands of Automation. The task of integrating diverse applications over a network of HP and non-HP machines is made easier with this software tool, by Mark Ikemoto, Mitchell J. Amino, Irene S. Smith, Alan C. Miranda, Scott A. Gulland, Cynthia Givens, Kathleen A. Fulton, pg 6-23
Configuration Files, pg 13-14
Performance in the HP Sockets Domain, pg 16
HP sockets Gateway, pg 20
Rigorous Software Engineering: A Method for Preventing Software Defects. Formal specification languages enable software engineers to apply the rigorous concepts of discrete mathematics to the software development process, by Stephen P. Bear, Tony W. Rush, pg 24-31. HP-SL.
Specifying an Electronic Mail System with HP-SL. Starting with a list of system features and capabilities, an HP-SL specification for a simple mail system is developed and the steps involved in this process are analyzed, by Patrick G. Goldsack, Tony W. Rush, pg 32-39. Specification Language.
Specification of State in HP-SL, pg 38
Specifying Real-Time Behavior in HP-SL. Using the event and history specification features of HP-SL, the software for a real-time alarm monitor is specified, by Paul D. Harry, Tony W. Rush, pg 40-45. Specification Language.
History Specifications, pg 43
Using Formal Specification for Product Development. In one product development project, the use of precise software specifications helped to uncover potential problems that might ordinarily be overlooked, and raised some interesting issues about using formal techniques, by Curtis W. Freeman, B. Robert Ladeau, pg 46-50. HP-SL, Specification Language.
Formal Specification and Structured Design in Software Development. HP-SL history specifications and techniques from structured analysis are used to create a formal specification for a critical portion of the code for a medical instrument, by J. Daren Bledsoe, Paul D. Harry, Judith L. Cyrus, pg 51-58
Telecommunications Network Monitoring System. This system supervises any telephone network using the 2-Mbit/s CEPT primary rate interface and the CCITT R2 or #7 signaling system. It automatically collects and analyzes data on CCITT-specified and other parameters related to the calls flowing through the network nodes, by Nicola De Bello, Marco Silvestri, Giuseppe Mazzucato, Antonio Posenato, pg 59-65. E3500A.
Authors December 1991: Mitchell J. Amino, Irene [Skup] S. Smith, Mark Ikemoto, Alan C. Miranda, Kathleen [Kathy] A. Fulton, Cynthia Givens, Scott A. Gulland, Tony W. Rush, Stephen P. Bear, Patrick C. Goldsack, Paul D. Harry, B. Robert Ladeau, Curtis W. Freeman, Judith L. Cyrus, J. Daren Bledsoe, Marco Silvestri, Antonio Posenato, Giuseppe [Beppo] Mazzucato, Nicola [Nick] De Bello, pg 66-68
Index: Volume 42 January 1991 through December 1991. PART 1: Chronological Index, pg 69-70. PART 2: Subject Index, pg 71-73. PART 3: Product Index, pg 74. PART 4: Author Index, pg 75.