(NpO^WENNYE ISSLEDOWANIQ bssr (B/s - (NmI[ANOWA(B, (Ne(B.(Na(B.s; (NmINISTERSTWO WYS[EGO OBRAZOWANIQ sssrs; (NbELORUSSKIJ GOSUDARSTWENNYJ UNIWERSITET IM(B. (Nw(B.(Ni(B. (NlENINA(B.s ((NmINSK (B:s (NiZD(B-(NWO bELGOSUNIWERSITETA IM(B. (Nw(B.(Ni(B. (NlENINA(B,s, 1959)
Keywords: (NpO^WOWEDENIEs -- (Nbssrs