Niobium from Soviet Union (1922-1991)
Belarus | |
| I. V. Levitskiy, V. I. Levitskiy, L. A. Pavlova, M. V. Lukashova (2023, February) Native Niobium in the Rocks of the Bobruisk Marginal Salient of the Eastern European Craton Foundation, - In book: XIII General Meeting of the Russian Mineralogical Society and the Fedorov Session |
Russia | |
| [AmMin 84:992] |