(NiZMELX^ENIE RUD (B/ s - (NpEROW(B, (NwALENTIN aLEKSANDROWI^s; (NbRAND(B, (NwLADIMIR `LXEWI^s ((NlENINGRAD (B; s (NmOSKWA (B: s (NIZD(B-(NWO I TIP(B. (NmETALLURGIZDATA(B, s, 1950)
(NbIBLIOGR(B.: (NS(B. 218-220s
Keywords: (NrUDY s -- (NiZMELX^ENIEs; (NoBOGA]ENIE POLEZNYH ISKOPAEMYHs; (NdROBILXNYE MA[INYs