TY  - BOOK
AU  - Velde,B.
TI  - Introduction to clay minerals: chemistry, origins, uses, and environmental significance 
SN  - 0412370301
U1  - 549.6 23
PY  - 1992///
CY  - London, New York
PB  - Chapman & Hall
KW  - Clay
KW  - Analysis
KW  - Clay minerals
N1  - Includes bibliographical references (p. 36-40) and index
ER  -