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The Computer-A Philatelic Collection
January-March 1992 (vol. 14 no. 1)
pp. 56-61

1. R.L. Neil,The Philatelic Exhibitor's Handbook, Traditions Press, Kansas, 1988.
2. G. Ifrah,Les Chiffres, Paris, 1985.
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4. M. Ascher, "The Logical-Numerical System of the Inca Quipus,"Annals of the History of Computing, Vol. 5, No. 3, 1983, pp. 268-278.
5. D.E. Smith,A Source Book in Mathematics, Dover Publications, New York, 1958, pp. 186-191.
6. S. Drake, "Galileo and the First Mechanical Computing Device,"Scientific American, 234, April 1976.
7. A. Adam, "The Kepler-Schickard Calculating Machine," in A. Beer and P. Beer, eds.,Vistas in Astronomy, Vol. 18 (Kepler 400 Years), Pergamon Press, London, 1955.
8. L.E. Sadovski, "On the Historical Development of Mathematical Machines in Russia" (in Russian),Uspehi Matem. Nauk, 5, Vol. 36, No. 2, 1950, pp. 57-71.
9. Hyman, A. 1984.Charles Babbage: Pioneer of the Computer. Oxford: Oxford University Press.

Menachem Lador, "The Computer-A Philatelic Collection," IEEE Annals of the History of Computing, vol. 14, no. 1, pp. 56-61, Jan.-March 1992, doi:10.1109/MAHC.1992.10005
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