Não informado. (1959). Handbook. Department of Mineral end Energy Affairs.
Chicago Style (17th ed.) CitationNão informado. Handbook. Pretoria, Africa do Sul: Department of Mineral end Energy Affairs, 1959.
MLA (8th ed.) CitationNão informado. Handbook. Department of Mineral end Energy Affairs, 1959.
Warning: These citations may not always be 100% accurate.