@book{5738,
	author = {Leach, Donald P.},
	title = {Experiments in digital principles /},
	publisher = {Gregg/Community College Div,},
	year = {1988.},
	address = {[S.l.] :},
	edition = {3 Sub ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070369186/chopaconline-20}
}