L. S. Berg's Natural regions of the U.S.S.R. Tr.: Olga Adler Titelbaum.
R665600. L. S. Berg's Natural regions of the U.S.S.R. Tr.: Olga Adler Titelbaum. NM: translation. © 16May50; A43941. American Council of Learned Societies (PWH); 22Jun77; R665600.
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