Não informado. (1971). Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics.
Chicago-Zitierstil (17. Ausg.)Não informado. Minerals and Mineral Products. Canberra: Commonwealth Bureau of Census and Statistics, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.