Map r.Angars and parts of the lake.Baikal

Map r.Angars and parts of the lake.Baikal.- -.-First sexes.XVIII century.;Kart.Op.109;52x46;Additional Agreement No. 1 of May 21, 2021 to the contract.No. 90-19 dated August 27, 2019 (Ban)..Electronic copy source: ban