@book{18803,
	author = {Velde, B.},
	title = {Origin and mineralogy of clays /},
	publisher = {Springer,},
	year = {c1995.},
	series = {Clays and the environment},
	address = {Berlin ; New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0815/95024195-d.html}
}