Preface

Ralph E. Grim and A. F. Frederickson
Committee on Clay Minerals, National Research Council, University of Illinois, Urbana, Illinois
Committee on Clay Minerals, National Research Council, Washington University, St. Louis, Missouri

Clays and Clay Minerals; 1953 v. 2; no. 1; p. V-VI; DOI: 10.1346/CCMN.1953.0020101
© 1953, The Clay Minerals Society
Clay Minerals Society (www.clays.org)