Ladoga lake.An excerpt of the map of the northern part of Lake Ladoga (with the island of Valaam) and part of Finland.

Ladoga lake.An excerpt of the map of the northern part of Lake Ladoga (with the island of Valaam) and part of Finland.- -.-XIX century.;Kart.Additional.118;38 x 57;Additional Agreement No. 1 of May 21, 2021 to the contract.No. 90-19 dated August 27, 2019 (Ban)..Electronic copy source: ban