- 1Thomas K. Derry; Trevor I. Williams
A short history of technology : from the earliest times to A.D.1900
New York: Dover Publ. 1993; XVIII, 782 S. : Ill., Kt.
Technik; Geschichte Anfänge-1900 - 2Charles Babbage; Philip Morrison
On the principles and development of the calculator : and other seminal writings by Charles Babbage and others
New York: Dover Publ. 1961; XXXVIII, 400 S. : Ill.
Rechenmaschine; Geschichte