(N|KONOMIKA TRUDA (B:s (NoDOBRENO U^ENYM SOWETOM mOSKOWSKIJ w{pd W KA^ESTWE U^EBNOGO POSOBIQ (B/s - (NkUDRQWCEW(B, (Na(B.(Ns(B.s ((Nb(B/(NI (B:s (NpROFIZDAT(B,s, 1957)
Keywords: (NtRUDs