For citations:

Ivanov I.V., Zamotaev I.V. Scientific ideas of pedologist-geographer V.M. Fridland, their origins and development (to the 100th anniversary). Dokuchaev Soil Bulletin. 2020;(101):202-219. (In Russ.) https://doi.org/10.19047/0136-1694-2020-101-202-219