@book{2072,
	author = {Bethell, George. and Coppock, David.},
	title = {Integrated science 2:},
	publisher = {Oxford University Press,},
	year = {1991.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0199142696/chopaconline-20}
}