@book{643,
	author = {McSween, Harry Y., and Richardson, Steven McAfee,},
	title = {Geochemistry :},
	publisher = {Columbia University Press,},
	year = {2003.},
	address = {New York ;},
	edition = {Second edition.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10958805}
}