Vermiculite deposits in the Palaboroa area, N. E. Transvaal
By: by C. M. Schwellnus ... Publication of the Geological Survey Division.
Series: South Africa. Geological Survey. Geological series. Bulletin; no. 11; Geological series.  Bulletin (South Africa.  Geological Survey Division) ;; no. 11.
Publisher: The Government Printer
Published: 1938
Place of publication: Pretoria
Language: eng
Number of pages: 27
Subjects: Vermiculite.; Mines and mineral resources -- South Africa -- Transvaal.
Notes: Bibliographical foot-notes.
At head of title: ... Union of South Africa.  Department of Mines.