Preface

A. F. Frederickson
Clay Minerals Committee, National Academy of Sciences-National Research Council, University of Pittsburgh, Pittsburgh, Pennsylvania

Clays and Clay Minerals; 1961 v. 10; no. 1; p. xi; DOI: 10.1346/CCMN.1961.0100101
© 1961, The Clay Minerals Society
Clay Minerals Society (www.clays.org)