@book{971,
	author = {Cartmell, Edward. and Fowles, G.W.A.},
	title = {Valency and molecular structure /},
	publisher = {Butterworth & Co Publishers Ltd,},
	year = {1966.},
	address = {[S.l.] :},
	edition = {3rd Revised edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0408690003/chopaconline-20}
}