TY  - BOOK
AU  - National Conference on Clays and Clay Minerals(3rd: 1954, Oc
TI  - Clays and clay minerals
PY  - 1955///
CY  - National Academy of Sciences
PB  - Washington
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=4286
ER  -