@book{16598,
	author = {Barker, A. L. and Knapp, K. A.},
	title = {Work out chemistry GCSE /},
	publisher = {Macmillan,},
	year = {1987},
	series = {Macmillan workout series},
	address = {Houndmills :},
	note = {Includes index.}
}