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V. N. Goldyrev
Natural Science Institute of the Perm State National Research University 4 Genkel Str., Perm 614990, Russia.
Russian Federation
researcher
V. A. Naumov
Natural Sciences Institute of Perm State University, 4 Genkelya Str., Perm 614990, Russia
Russian Federation
Dr., Prof.
O. B. Naumova
Perm State University, 15 Bukireva Str., Perm 614990, Russia
Russian Federation
Chair of Department of Mineral Prospecting and Exploration, Dr., Prof.
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