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4. B. A. Il'ichev and V. O. Targul'yan, “Aeolian Inflow of Dust in the Forest Zone of the East European Plain during Holocene," in Processes of Soil Formation and Evolution (Nauka, Moscow, 1985) [in Russian].
5. K. N. Kulik and N. N. Dubenok, “Dust Storm in the Lower Volga Region in the Spring of 2015,” Vestnik Rossiiskoi Sel'skokhozyaistvennoi Nauki, No. 1 (2016) [in Russian].