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Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1 pp. 58–60, January, 1977.
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Shapiro, L.N. Twenty-Third International Geographical Congress. Hydrotechnical Construction 11, 93–97 (1977). https://doi.org/10.1007/BF02398763
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DOI: https://doi.org/10.1007/BF02398763