Babbage, Charles, "On a Method of Expressing by Signs the Action of Machinery," Philosophical Transactions of the Royal Society, 2, 250ff ( 1826).
2.
Reprinted in Charles Babbage: On the Principles and Development of the Calculator and Other Seminal Writings by Charles Babbage and Others, P. Morrison & E. Morrison, editors, Dover Publications, New York, 1961 , pp. 346-356.
3.
Babbage, Charles, Reflections On the Decline of Science in England, and Some of Its Causes, B. Fellowes, London, 1830.
4.
Babbage, Charles, On the Economy of Machinery and Manufactures, 2d ed., Charles Knight, London, 1832.
5.
Babbage, Charles, "On the Mathematical Powers of the Calculating Engine," ( 1837). (Appendix B [pp. 268-276] in Hyman, 1982).
6.
Babbage, Charles, Passages From the Life of a Philosopher, Longman, Green , London, 1864. Reprinted by Dawsons, London, 1968 .
7.
Berg, Maxine, The Machinery Question and the Making of Political Economy 1815-1848 , Cambridge University Press, Cambridge, 1980.
8.
Bromley, Allan G., Introduction to Babbage's Calculating Engines: A Collection of Papers by Henry Provost Babbage, Tomash, Los Angeles , 1982.
9.
Hyman, Anthony, Charles Babbage: Pioneer of the Computer, Princeton University Press, Princeton, NJ, 1982.
Reprinted in Charles Babbage: On the Principles, P. Morrison & E. Morrison, editors, pp. 163-224.
12.
Lovelace, Ada Augusta, "Notes Upon L.F. Menabrea's Sketch of the Analytical Engine Invented by Charles Babbage," Bibliotheque Universelle de Geneve, No. 82 (October, 1842).
13.
Reprinted in Charles Babbage: On the Principles, P. Morrison & E. Morrison, editors, pp. 245-295.
14.
Marshall, Alfred, Industry and Trade, Macmillan, London, 1927.
