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3. D. S. Orlov, Soil Chemistry (Mosk. Gos. Univ., Moscow, 1985) [in Russian].
4. Regulatory Role of Soil in the Functioning of Taiga Ecosystems (Nauka, Moscow, 2002) [in Russian].
5. R. Benner and S. Opsahl, “Molecular Indicators of the Sources and Transformations of Dissolved Organic Matter in the Mississippi River Plume,” Org. Geochem. 32(4), 597–611 (2001).