Clays and clay minerals, vol. 10 : proceeings of the tenth National Conference on Clays and Clay Minerals, Austin, Texas, October 14 - 18,1961 / Ada Swineford, editor ; National Conference on Clays and Clay Minerals National Conference on Clays and Clay Minerals Clay Congresses. TN941 .N3 549.6 NAC Includes bibliographical references and index. London : Pergamon Press, 1963. 1963. 1963 Text v. : eng International series of monographs on earth sciences ; 12 California. Division of Mines. Bulletin 169. [from old catalog] National Research Council (U.S.). Publication 327 [etc.]