@book{577,
	author = {Tobey, G. E.},
	title = {Operational amplifiers; design and applications /},
	publisher = {Mcgraw-Hill (Tx),},
	year = {1971.},
	address = {[S.l.] :},
	edition = {First Edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070649170/chopaconline-20}
}