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3. M. F. Veklich, Problems of Paleoclimatology (Naukova dumka, Kiev, 1982) [in Russian].
4. V. R. Volobuev, Introduction to the Energetics of Soil Formation (Nauka, Moscow, 1974) [in Russian].
5. A. N. Gennadiev, Soils and Time: Models of Development (Izd. Mosk. Gos. Univ., Moscow, 1990) [in Russian].