(NpROBLEMY RUDNI^NOJ A\ROLOGII I WNEZAPNYH WYBROSOW UGLQ I GAZA (B/s - (NsKO^INSKIJ(B, (NaLEKSANDR aLEKSANDROWI^s; (NiNSTITUT GORNOGO DELA an sssrs ((NmOSKWA (B:s (NiZD(B-(NWO an sssr(B,s, 1958)
Keywords: (NuGOLXNYE [AHTY s -- (NwYBROSY UGLQs; (NuGOLXNYE [AHTY s -- (NgAZOWYDELENIEs; (NrUDNI^NAQ WENTILQCIQs -- (NsBORNIKIs