The geology of the Postmasburg manganese deposits and the surrounding country. An explanation of the geological map - Nel, Louis T. (Louis Taylor), 1895-; Geological Survey (South Africa) (Pretoria : The Government printer, 1929)
At head of title : Union of South Africa. Department of mines and industries. Geological survey.
Keywords: Manganese ores -- South Africa; Geology -- South Africa -- Postmasburg