The geological map of Lake Baikal, compiled by I. D. Chernsky, printed, with his own marks I. D. Chernsky.The map "To the prelim...

The geological map of Lake Baikal, compiled by I. D. Chernsky, printed, with his own marks I. D. Chernsky.The map "To the preliminary report for 1880 of the news of the East Siberian department of I. R. Geographical Society, vol. XII, No. 2 and 3. Article on this map and work on it I. D. Chernsky see in the collection of copyright materials No.nineteen. - -.-XIX century.;Kart.Additional.270;;Additional Agreement No. 1 of May 21, 2021 to the contract.No. 90-19 dated August 27, 2019 (Ban)..Electronic copy source: ban