U.S.S.R. - Central Urals. U.S.S.R. - Lower Volga. Pergamon World Atlas.
U.S.S.R. - Central Urals. U.S.S.R. - Lower Volga. Pergamon World Atlas. Pergamon Press, Ltd. & P.W.N. Poland 1967. Sluzba Topograficzna W.P.
Polish Army Topography Service
1967
1968
Pergamon Press
1:2 500 000