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Bulgaria | |
| [MinRec 22 p.439] |
| R. Vassileva, R. Atanassova, K. Kouzmanov, E. Stefanova (2011): As-bearing pyrite-marcasite intergrowths from the Pb-Zn Erma Reka deposit, South Bulgaria. Joint Meeting of the DGK, DMG and ÖMG, Salzburg, Austria, September 20-24, 2011 Abstracts Volume, p. 79-80. |
Madan ore field, Smolyan Province, Bulgaria