Não informado. (1957). Bibliography and Subject Index of South African Geology. Geological Survey of South Africa.
Citace podle Chicago (17th ed.)Não informado. Bibliography and Subject Index of South African Geology. Pretoria, Africa do Sul: Geological Survey of South Africa, 1957.
Citace podle MLA (8th ed.)Não informado. Bibliography and Subject Index of South African Geology. Geological Survey of South Africa, 1957.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..