@book{7173,
	author = {Couch, Leon W.},
	title = {Digital and Analog Communication Systems /},
	publisher = {Prentice Hall,},
	year = {2008.},
	series = {7th edition.},
	address = {[S.l.] :},
	edition = {7th ed.},
	url = {http://10.10.170.122:8080/browse/book/23899}
}