@book{1560,
	author = {Allen, John L.},
	title = {Environment 97/98 /},
	publisher = {Dushkin Pub Group,},
	year = {1997.},
	series = {16th ed.},
	address = {[S.l.] :},
	edition = {16th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0697372669/chopaconline-20}
}