Original Documents on the History of Calculators. de Man, A.
Original Documents on the History of Calculators [link]Paper  abstract   bibtex   
Documents et brevets sur les machines à calculer
@misc{de_man_original_nodate,
	title = {Original {Documents} on the {History} of {Calculators}},
	url = {http://ajmdeman.awardspace.info/},
	abstract = {Documents et brevets sur les machines à calculer},
	urldate = {2013-12-09TZ},
	author = {de Man, Andries}
}
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