Archive
Domestic trips
1981 business trips
Note, 25.05.1981-05.06.1981
Notes, 01.06.1981
Memorabilia, 25.05.1981-05.06.1981
Letter, A. L. Schors->A.P. Ershov, 24.08.1981
Information letter, 15.12.1980
Letter, Ya. M. Barzdin->A.P. Ershov, 10.07.1981
Letter, A. L. Schors->A.P. Ershov, 22.04.1981
Decision, 23.03.1981

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