@book{207494,
	author = {Heide, Lars, and ebrary, Inc.},
	title = {Punched-card systems and the early information explosion, 1880-1945},
	publisher = {Johns Hopkins University Press,},
	year = {2009.},
	series = {Studies in industry and society},
	address = {Baltimore :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10381425}
}