Long, V., Pardieu, G., Giuliani, P., & Pham Van Long, V. (2013). Update on Gemstone Mining in Luc Yen, Vietnam. Gems & Gemology, 49(4), 233-245. Link to Article
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Long, V., Pardieu, G., Giuliani, P., & Pham Van Long, V. (2013). Update on Gemstone Mining in Luc Yen, Vietnam. Gems & Gemology, 49(4), 233-245. Link to Article