(NkO\FFICIENTY TRENIQ(B:s (NsPRAWO^NOE POSOBIE (B/s - (NkRAGELXSKIJ(B, (Ni(B.(Nw(B.s; (NwINOGRADOWA(B, (Ni(B.(N|(B.s ((NmOSKWA(B:s (NmA[GIZ(B,s, 1962)
Keywords: (NtRENIE TWERDYH DELs