Perlite (commodity) from Sonoran Desert, North America
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| docs.azgs.az.gov (n.d.) http://docs.azgs.az.gov/OnlineAccessMineFiles/C-F/ChicagoPitPinalT2SR12ESec9.pdf |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
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Luetcke, Rolf (n.d.) Personal communication. |