PROKOF’EVA, Tatiana Vadimovna. Experience of the teaching of soil classification systems to students at different stages of education (Faculty of Soil Science, LMSU, Russia). Bulletin of Geography. Physical Geography Series. Online. 18 May 2018. No. 14, pp. 85-90. [Accessed 18 July 2024]. DOI 10.2478/bgeo-2018-0008.