@book{594,
	author = {Chang, Raymond.},
	title = {Essential chemistry /},
	publisher = {Mcgraw-Hill (Tx),},
	year = {1996.},
	address = {New York},
	edition = {International edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0071140956/chopaconline-20}
}