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| (1998) International strategic mineral issues summary report: tungsten. Circular 930-O. US Geological Survey doi:10.3133/cir930o |
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| Sadanaga, Ryoichi, Bunno, Michiaki (1974) The Wakabayashi Mineral Collection. Bulletin 7. The University Museum, The University of Tokyo |
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| Kondo, C. (1940) Jour. Min. Soc. Korea, 23, 11. |
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| HAMPEL, W., WAGNER, M. & SCHMIDT-THOME, M. (2005): Evaluation Report on Mineral Deposits in southern North Korea. – for BGR, 37 pp, 22 fig., 14 annexes |
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| HAMPEL, W., WAGNER, M. & SCHMIDT-THOME, M. (2005): Evaluation Report on Mineral Deposits in southern North Korea. – for BGR, 37 pp, 22 fig., 14 annexes |
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| University of Tokyo collection, specimen No. IX-343. |
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| Imai, A., & Anan, S. (2000). Sulfur isotope study and re‐examination of ore mineral assemblage of the Hol Kol and the Tul Mi Chung skarn‐type copper–gold deposits of the Suan mining district, Korean Peninsula. Resource Geology, 50(4), 213-228. |
