TY  - BOOK
AU  - Schwellnus,C.M.
TI  - Vermiculite deposits in the Palaboroa area, N. E. Transvaal,
T2  - South Africa. Geological Survey. Geological series. Bulletin
AV  - QE325 .A53 no. 11
PY  - 1938///
CY  - Pretoria
PB  - The Government Printer
KW  - Vermiculite
KW  - Mines and mineral resources
KW  - South Africa
KW  - Transvaal
N1  - At head of title: ... Union of South Africa.  Department of Mines; Bibliographical foot-notes
ER  -