For citations:

Ananko T.V., Gerasimova M.I. Dark-humus soils on the updated soil map of Russian Federation scale 1 : 2.5 M. Dokuchaev Soil Bulletin. 2021;(108):31-54. (In Russ.) https://doi.org/10.19047/0136-1694-2021-108-31-54