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Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 10, pp. 12–15, October, 1977.
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Pribyl'skii, I.S. Development of foreign economic relations. Chem Petrol Eng 13, 870–874 (1977). https://doi.org/10.1007/BF01142734
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DOI: https://doi.org/10.1007/BF01142734