TY  - BOOK
AU  - Beutelspacher,H., Marel, H.W. Vander.
AU  - x
TI  - Atals of electron microscopy of clay minerals and their admixtures: x
SN  - x
U1  - 549.1145/BEA 
PY  - 1968///
CY  - Lond
PB  - Elseviers Pub.
KW  - Mineralogy
N1  - x
ER  -