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| | Bibliografie |
 | | Babbage C., Passages from the Life of a Philosopher, New York, Augustus Kelley Publications, 1969, 211 p. |
 | | Boole G., An investigation of the laws of thought, on which are founded the Mathematical Theories of Logic and Probabilities, New York, Dover Publications, 1951, 424 p. |
 | | Stibitz G., "Early Computers", in: Metropolis N., Howlett J. and Rota G.C. (eds.), A History of Computing in the Twentieth Century, New York, Academic Press, 1980, pp. |
| www.ethesis.net /nieuwe_media/bibliogr.htm (1748 words) |
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