Não informado. (2003). South African mining, coal, gold & base minerals. Thomson Publication.
Citace podle Chicago (17th ed.)Não informado. South African Mining, Coal, Gold & Base Minerals. Johannesburg, Africa do Sul: Thomson Publication, 2003.
Citace podle MLA (8th ed.)Não informado. South African Mining, Coal, Gold & Base Minerals. Thomson Publication, 2003.
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