@book{309,
	author = {Ha, Tri T.},
	title = {Digital satellite communications (mcgraw-hill international edit /},
	publisher = {McGraw-Hill,},
	year = {1990.},
	series = {Mcgraw-hill communications series.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0071007520/chopaconline-20}
}