(NiNVENERNYE SOORUVENIQ I ZDANIQ GORNYH PREDPRIQTIJ (B:s (Nu^EBNOE POSOBIE (B/s - (NmAKSIMOW(B, (Na(B.(Np(B.s ((NmOSKWA (B:s (NuGLETEHIZDAT(B,s, 1954)
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Keywords: (NkAMENNYE UGLI W CELOMs