(NnAU^NO(B-(NTEHNI^ESKAQ REWOL@CIQ I PROBLEMY RAZWITIQ OB]ESTWA (B/s - (NaKADEMIQ NAUK sssrs ((NsWERDLOWSK (B:s (Nb(B. (NI(B.,s, 1974)
Keywords: (Nntrs