Ethnographic map of the USSR |
 Geographical atlas edited by Jury M. Shokalksky State cartography and geodesy publishing house of the Institute of geodesy and crtography. Leningrad. 1930. |
Ethnographic map of the USSR |
Geographical atlas edited by Jury M. Shokalksky State cartography and geodesy publishing house of the Institute of geodesy and crtography. Leningrad. 1930. |