Memo, A.P. Ershov->G. D. Chinin, 24.06.1983 Request to use the institute's conference hall for Anniversary Seminar
International Telegram, A. O. Buda ->A.P. Ershov, 27.06.1983from Mathematical Logics Sector of Bulgarian AS IMM
Telegram, N. V. Shkut->A.P. Ershov, 29.06.1983with greetings to Ershov and his colleagues
Congratulation, 29.06.1983(?)from Ukrainian colleagues
Congratulation, 30.06.1983Anniversary congratulations from the Computing Center's administration
Speech, 30.06.1983(?)congratulation in verse (in Belorussian)
Invitation, 30.06.1983to the Anniversary celebration seminar session
List, 30.06.1983of person signed in for participation in the discauusion at the Anniversary Seminar (handwritten draft)
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