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Scientific foreign trips
Scientific trip to Bulgaria (1980)
Letter
Letter
Date: 26.08.1980
Original document language: russian
Authors: Lyubomir Iliev
Organizations: United Center of Mathematics and Mechanics
Persons: Igor V. Pottosin, Leonid B. Efros, Andrei Petrovich Ershov
Addressee: Anatoly S. Alekseev, P. S. Oraevsky

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