Archive
Scientific foreign trips
Scientific trip to the Czechoslovakia (1977)
Item 1. (Name does not exist in this language.)
Telegram, A.P. Ershov->A.A. Klas, 30.03.1981
Letter, A.A. Klas->A.P. Ershov, 10.04.1981
Telegram, A.A. Klas->A.P. Ershov, 13.04.1981
Telegram (draft), A.P. Ershov->S.A.Sokolov, 11.05.1981

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