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Character reference, 25.12.1969
Character reference
Extract, 10.12.1969(?)
Extract, 12.12.1969(?)
Letter, 14.10.1969
List, 01.10.1969(?)
List, 01.10.1969(?)
List
List
List
List
Memo, A.P. Ershov->L. V. Ovsyannikov..., 11.09.1969
Memo, L. V. Ovsyannikov->A. A. Lyapunov, 10.10.1969
Minutes, 01.06.1970
Note, 20.05.1970(?)
Note
Presentation, A. A. Lyapunov->A.P. Ershov, 25.12.1969
Presentation
Report note, A.P. Ershov->I. S. Fedorchenko
Report note, A.P. Ershov->I. S. Fedorchenko, 27.03.1970
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