1. Geological scetchmap [sic] of the Transvaal : topography and geology Yale Public content 1902. 2002-06-01T04:00:00Z. 2018-02-15T20:24:53Z. Molengraaff, G. A. F. (Gustaaf Adolf Frederik), 1860-1942, cartographer. s.n., P.W.M. Trap). CtY-BR. English. Public. South Africa, Transvaal, and Transvaal (South Africa).