Preface

Ralph E. Grim and A. F. Frederickson
Clay Minerals Committee, National Academy of Sciences—National Research Council

Clays and Clay Minerals; 1955 v. 4; no. 1; p. vii; DOI: 10.1346/CCMN.1955.0040101
© 1955, The Clay Minerals Society
Clay Minerals Society (www.clays.org)