@book{4226,
	author = {Fitz, Michael.},
	title = {Fundamentals of Communications Systems },
	publisher = {McGraw-Hill Professional,},
	year = {2007.},
	series = {Communications engineering.},
	address = {[S.l.] :},
	edition = {1st ed.},
	url = {http://www.amazon.com/exec/obido}
}