@book{13831,
	author = {Tokeim, Roger L.},
	title = {Activities manual for digital electronics /},
	publisher = {McGraw-Hill,},
	year = {1984.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/B000OFY37C/chopaconline-20}
}