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Thailand | |
| Dill, H.G., Melcher, F., and Botz, R. (2008): Ore Geology Reviews 34, 242-262. (1998) International strategic mineral issues summary report: tungsten. Circular 930-O. US Geological Survey doi:10.3133/cir930o |
| Dill, H.G., Melcher, F., and Botz, R. (2008): Ore Geology Reviews 34, 242-262. |