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2. Austrian, Geoffrey. Herman Hollerith: Forgotten Giant of Information Processing. Columbia University Press, New York. 1982.
3. The Trustees of Indiana University. John Shaw Billings, M.D. (- 935, http://www.medlib.iupui.edu/hom/billings.html
4. Evan, Christiopher. The Micro Millenium. 1979. Viking Press.
1.Biography in Encyclopaedia Britannica
2.A G Debus (ed.), Herman Hollerith, World's Who's Who in Science (1968).
3.Herman Hollerith, Dictionary of American Biography.
4.K S Reid-Green, The history of census tabulation, Scientific American 260 (1989), 78-83.
5.A Class, Introducing the past master of punch cards, Computing (1990), 16-17.
6.F W Kistermann, The invention and development of the Hollerith punched card : in commemoration of the 130th anniversary of the birth of Herman Hollerith and for the 100thanniversary of large scale data processing, Annals of the history of computing 13 (1991), 245-259.
http://www.invent.org/book/book-text/57.html http://www.ifi.unizh.ch/groups/se/people/hoyle/Lecture/hollerith.html http://tdi.uregina.ca/~complit/holler.html http://www-stall.rz.fht-esslingen.de/studentisches/Computer_Geschichte/grp2/holler.html http://www.kzoo.edu/~abrady/CS400/bioW96/burgess.html">http://www.vma.bme.hu/mathhist/Mathematicians/Hollerith.html>http://www.kzoo.edu/~abrady/CS400/bioW96/burgess.html
Introduction | Hollerith finds employment with the Census Bureau | The Influence of Dr. Billings | The Jacquard Loom | Hollerith's First Design | Advantages of Hollerith's Device | Hollerith Cards | Modifactions to Hollerith's Device | Field Testing | The Problem of the Census | The Evolution of Hollerith's System | The TwelfthCensus | Hollerith's Success | Resources