Covering letter, 06.11.1977
Letter, A. H. Vyrk->A.P. Ershov, 03.10.1977
Letter, 05.10.1977
Letter, S. L. Sobolev->A.P. Ershov, 29.09.1977
Letter (hand-written), G. E.Tseitlin ->A.P. Ershov, 04.10.1977
Covering letter, V. P. Breev->A.P. Ershov, 19.09.1977
Letter, 12.09.1977
Information, 22.09.1977
Letter (hand-written), 22.08.1977
Telegram, R. I. Podlovchenko->A.P. Ershov, 21.09.1977
Letter, 20.07.1977
Letter, L. I. Mikulich->A.P. Ershov, 12.09.1977
Letter (hand-written), V.Ya. Rozenberg->A.P. Ershov, 01.09.1977
Letter, 19.07.1977
Letter (hand-written), I. D. Zaslavsky->A.P. Ershov, 20.09.1977
Letter (hand-written), Ya. M. Barzdin->A.P. Ershov, 25.07.1977Request to make the presentation "Automatic construction of complete sample system for program testing" at the IFIP Congress since it turned out that the author will not be present
Note, A. N. Miamlin->A.P. Ershov, 11.07.1977
Letter, O. V. Ushakova->A.P. Ershov, 15.07.1977
Express telegram, 25.07.1977
Telegram, A. A. Dorodnitsyn->A.P. Ershov, 25.07.1977
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