@book{28393,
	author = {Gregory, Robert Henry. and Van Horn, Richard L.,},
	title = {Automatic data-processing systems :},
	publisher = {Wadsworth Pub. Co. ;},
	year = {1963.},
	series = {Wadsworth accounting and data processing series.},
	address = {Belmont, Calif. :},
	edition = {2d ed.},
	note = {includes index.}
}