3. oldal / 3
Felhasznált irodalom:
- http://hu.wikipedia.org/wiki/Herman_Hollerith
- http://en.wikipedia.org/wiki/Herman_Hollerith
- http://www.freeweb.hu/mattort/hollerith/cikk.html
- http://www.census.gov/history/www/census_then_now/notable_alumni/herman_hollerith.html
- http://www.census.gov/history/www/census_then_now/notable_alumni/john_shaw_billings.html
- http://cultureandcommunication.org/
- http://www.watson.ibm.com/t_j_watson_history.shtml
- http://www-03.ibm.com/ibm/history/history/decade_1900.html