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Romania | |
| Marincea, S. (1999) Ludwigite from the type locality, Ocna de Fier, Romania: new data and review. Canadian Mineralogist, 37, 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania new data and review. The Canadian Mineralogist, 37(6), 1343-1362. |
| Marincea, S. (2000). Magnesian borates and associated minerals in the Cacova Ierii skarn deposit (Apuseni Mountains, Romania). Geonomos 8(1):1-7 |
| Gabor Koller specimen |
Eibenthal, Dubova, Mehedinti County, Romania