01149nam0-22003491i-450-99000033765040332120091102162518.0000033765FED01000033765(Aleph)000033765FED0100003376520091102d1960----km-y0itay50------baengGBy-------001yyClays and clay mineralsproceedings of the 7. national conference on clays and minerals, Washington, D.C., October 20-23, 1958Ada Swineford editorassociate editors Tomas F. Bates ... [et al.]LondonPergamon Press1960IX, 369 p.ill.23 cmInternational series of monographs on earth sciences5ArgilleCongressi1958668553.61Swineford,AdaNational conference on clays and clay minerals<7. ;1958 ;Washington>ITUNINARICAUNIMARCBK99000033765040332104 186-304/7DICDINCH13 G 11 0423851FINBCDINCHFINBCUNINA