For citations:

Yusupova T.I. “Such a Geographer – Asian Expert as You Cannot be Replaced”: Letters of Yu.M. Shokalsky to G.E. Grumm-Grzhimailo (in Commemoration of the 160th Anniversary of Grigory E. Grumm-Grzhimailo). Proceedings of the Russian Geographical Society. 2020;152(2):75-86. (In Russ.) https://doi.org/10.31857/S0869607120020093