For citations:

Pismennaya E.V., Stukalo V.A. TRENDS IN USE OF THE STEPPE LAND RESOURCES OF STAVROPOL REGION IN DIFFERENT PERIODS OF THE AGRARIAN ECONOMY. South of Russia: ecology, development. 2017;12(4):79-89. (In Russ.) https://doi.org/10.18470/1992-1098-2017-4-79-89