(NtEPLOWAQ DEPRESSIQ [AHTNOJ WENTILQCII (B/s - (NwOROPAEW(B, (Na(B.(Nf(B.s; (NsKO^INSKIJ(B, (Na(B.(Na(B. s; (NiNSTITUT GORNOGO DELA an sssrs ((NmOSKWA (B;s (NlENINGRAD (B:s (NiZD(B-(NWO an sssr(B,s, 1950)
Keywords: (NtEPLOWAQ DEPRESSIQ (B- (N{AHTNAQ WENTILQCIQs