The map of the Volga flow from the tributary of the Irgiz to the influx of Eruslan

The map of the Volga flow from the influx of Irgiz to the influx of Eruslan.- -.-Con.XVIII century.;Kart.Op.150;74x81;Additional Agreement No. 1 of May 21, 2021 to the contract.No. 90-19 dated August 27, 2019 (Ban)..Electronic copy source: ban