(NlENINGRADSKAQ OBLASTX W SEMILETKE (B/s - (NgOLOWANOW(B, (NsERGEJ sERGEEWI^s ((NlENINGRAD (B:s (NlENIZDAT(B,s, 1959)
Keywords: (N|KONOMIKA NARODNOGO HOZQJSTWAs