. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. Fig. 136. Surface salinity of the contemporary Baltic Sea (A) and of the Littorina Sea (B) (Petterson).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevich, L. A. (Lev Aleksandrovich), 1889-1970. New York, Interscience Publishers

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