The geology of the country around Vredefort, an explanation of the geological map.
By Louis T. Nel.
- Pretoria, The Government Printing and Stationery Office, 1927.
- 134 p., xv plates. illus., tables. 24 cm.
- Union of South Africa Department of Mines and Inustries. Geological survey .
- South Africa. Department of Mines and Industries. Geological survey. .