Nota kaki Bauksit

Nota kaki Bauksit

↑ "Bauxite and Alumina" (PDF). U.S. Geological Survey. m/s. 2. Dicapai 9 Januari 2014.
↑ "Bauxite and Alumina" (PDF). U.S. Geological Survey (Mineral Commodity Summaries). January 2012. m/s. 27. Dicapai August 1, 2012.
1 2 "World mineral statistics | MineralsUK". Bgs.ac.uk. Dicapai 2013-10-25.

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