@book{1238,
	author = {Zumdahl, Steven S.},
	title = {chemistry },
	publisher = {D.C. Heath and Company,},
	year = {1986.},
	address = {[S.l.] :},
	edition = {3rd},
	url = {http://www.amazon.com/exec/obidos/ASIN/0669045292/chopaconline-20}
}