(NmATEMATI^ESKIE METODY W PLANIROWANII I UPRAWLENII GORNYM PROIZWODSTWOM (B:s (Nu^EBNOE POSOBIE (B/s - (NkULI[(B, (Ns(B.(Na(B.s ((NmOSKWA (B:s (NnEDRA(B,s, 1978)
Keywords: (NgORNOE DELO (B- (NmATEMATI^ESKIE METODYs