@book{27642,
	author = { National Conference on Clays and Clay Minerals and Ingerson, Earl },
	title = { Clays And Clay Minerals : Proceedings Of The Sixth National Conference On Clays And Clay Minerals, Berkeley, California, August 19 - 23, 1957 /},
	publisher = {Pergamon Press ,},
	year = {1959},
	address = {London :}
}