@book{12915,
	author = {Fraser, W. },
	title = {Telecommunications : an introductory textbook for engineering students},
	publisher = {MacDonald & Co,},
	year = {1972.},
	address = {[S.l.] :},
	edition = {4th ed. },
	url = {http://www.amazon.com/exec/obidos/ASIN/B0041V8T2K/chopaconline-20}
}