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A. K. Alvanyan
Perm State University. 15 Bukireva Str., Perm 614990, Russia
Russian Federation
Cand.geol.-min.Sci., Associate Professor of Department of Engineering Geology and Environment Protection
M. V. Ovsyannikov
UralGeoProekt LLC, 3/7 Revolyutsii Str., Perm 614007, Russia
Russian Federation
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