The Pretoria salt-pan, a soda caldera,
by Percy A. Wagner ...
- Pretoria, The Government Printing and Stationery Office, 1922.
- 136 p. XIX pl. (part fold.; incl. fold. col. map) tables. 25 cm.
- South Africa. Geological Survey. Memoir no. 20 .
At head of title: Union of South Africa. Department of mines and industries.
Bibliographical foot-notes.
gs 23000005
Geology, Economic--South Africa. Mines and mineral resources--South Africa. Salt mines and mining--South Africa.