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Letter
Programme
Form
Letter, A. A. Dorodnitsyn->N. N. Bogolyubov..., 10.11.1974(?)
Letter, 10.11.1974(?)
List, 03.01.1977
List, 03.01.1977
List, 10.01.1977
Letter, 31.01.1977
Letter, 07.02.1977
List, 08.02.1977
Rules, 01.04.1977
Decision, 08.04.1977
Telegram, A.P. Ershov->W. M. Turski, 26.04.1977
Written Rules, 30.04.1977
Programme, 16.05.1977
Estimate, 19.05.1977
Invitation, 22.05.1977
Programme, 22.05.1977
List, 24.05.1977
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