(NmOLITWA WO TXME (B/s - (NkASTELXQNOS(B, (NrOSARIOs; (NaBEZGAUZ(B, (Nm(B.s; (NsWET(B, (Nq(B.s ((NmOSKWA (B:s (NpROGRESS(B,s, 1973)
Keywords: (NmEKSIKA(B, 20 (NW(B. ((NH(B. (NL(B.)s; (NiNDEJCY sEWERNOJ aMERIKI (B((NH(B. (NL(B.)s