@book{517,
	author = {Green, D. C.},
	title = {Electronics iv :},
	publisher = {Addison Wesley Publishing Company,},
	year = {1981.},
	address = {[S.l.] :},
	edition = {4th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0273015044/chopaconline-20}
}