@book{537,
	author = {Bellamy, John C.},
	title = {Digital telephony /},
	publisher = {Wiley,},
	year = {c2000.},
	address = {New York:},
	edition = {3rd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/wiley0310/99034015.html}
}