Creation of a Mining Unit in the Azov Region - Basis For the Formation of Rare-Metal and Rare-Earth Industry of Ukraine за авторством O. M. Ponomarenko, Ye. M. Sheremet, M. A. Kozar, L. V. Shpylovyi, S. M. Strekozov, Yu. Nikolaiev, S. H. Kryvdik, L. D. Sietaia

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