Department of Mines, Geological Survey, Union of South Africa Departement Van Mynwese, Geologiese Opname, Unie van Suid-Afrika Sheet 54 Lichtenburg Blad 54 Lichtenburg
Geological Survey (South Africa) Alex. L Du Toit 1878-1948. (Alexander Logie); J. W Von Backström; H. D Le Roex; Trigonometrical Survey (South Africa)
Pretoria Printed in the Union of South Africa by the Government Printer 1951
Localização: IGC - Instituto de Geociências (MP M3-266 )(Acessar)