@book{31141,
	author = {Bellamy, John,},
	title = {Digital telephony /},
	publisher = {Wiley,},
	year = {c1991.},
	series = {Wiley series in telecommunications.},
	address = {New York :},
	edition = {2nd ed.},
	note = {"A Wiley-Interscience publication."}
}