| Letter, A.P. Ershov->V. S. Lyubarov, 01.04.1981(?) to V.S.Liubarov - an account of Ershov's vision of the future presentation and requests to the artist concerning illustrations for the talk
Letter, A.P. Ershov->Yu. I. Manin, 04.01.1981sharing Ershov's thoughts at the sight of the addressee's book
Letter, A.P. Ershov->M. B. Khrapchenko, 24.11.1981
Letter, A.P. Ershov->D. S. Likhachev, 10.11.1981
Letter, A.P. Ershov->Yu. I. Manin, 18.11.1981with the draft of the paper with working title "Modern mathematical practice"
Letter (hand-written), 27.01.1981
Letter (hand-written), 27.01.1981
Telegram, A.P. Ershov->N. N. Lozinsky, 27.01.1981
Letter, A.P. Ershov->R. H. Piotrovsky, 23.01.1981
Letter (hand-written), A.P. Ershov->I. T. Firsova, 01.02.1981(?)
Letter, Yu. A. Pervin ->K. Antanasov..., 13.05.1981
Telegram, 10.02.1981
Covering letter, A.P. Ershov->P. S. Lavrov, 26.02.1981
Telegram, A.P. Ershov->V. V. Zhurin, 05.03.1981
Telegram, 05.03.1981
Letter, 09.03.1981
Memorandum, A.P. Ershov->A. S. Alekseev, 09.03.1981
Letter (hand-written), A.P. Ershov->V. A. Zvegintsev, 18.11.1981
Letter, A. S. Alekseev->V. V. Pazelskiy, 10.04.1981
Letter, A. S. Alekseev->V. S. Oschepkov, 23.04.1981
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