(NkURDY (B/s - (NwILX^EWSKIJ(B, (No(B.(Nd(B.s; (Nan sssrs ((NmOSKWA (B- (NlENINGRAD (B:s (NiZD(B-(NWO an sssr(B,s, 1961)
Keywords: (NwOSTOKOWEDENIEs -- (NkURDYs