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1
Crushing and screening of coals = Droblenie i grokhochenie uglei /
by Ponomarev, I. V.
New Delhi, India : Springfield, Va. : Amerind ; Available from N.T.I.S., 1977

Book
2
Ventilation for dust elimination in underground mines = (Obespylivayushchee provetrivanie podzemnykh vyrabotok) /
by Radchenko, Grigoriĭ Alekseevich
New Delhi : Amerind Publishing Co., 1976

Government Document Book
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