Não informado. (1971). Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Minerals and Mineral Products. Canberra: Commonwealth Bureau of Census and Statistics, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics, 1971.
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