The geology and archaaelogy of the Vaal River Basin - Sohnge, P.G.; Visser, D.J.L; Lowe, C. Van Riet, 1894 - (Pretoria : Government Printer, 1937)
At head of title : Union of South Africa. Department of Mines
Includes bibliographical references
Keywords: Geology -- Vaal River Basin; Vaal River Basin -- Antiquities