(NnORMIROWANIE KA^ESTWA UGLEJ (B/s - (N{MIDT(B, (Na(B.(Nk(B.s ((NmOSKWA (B:s (NuGLETEHIZDAT(B,s, 1953)
Keywords: (NuGOLX s -- (NkA^ESTWOs; (NuGLI(B, (NISKOPAEMYE (B- (NoPROBOWANIEs