Telegram, G.G. Gvaramiya->A.P. Ershov, 03.01.1981
Letter (hand-written), Unknown Author->A.P. Ershov, 05.01.1981
Information letter, A. A. Stogniy->A.P. Ershov, 09.01.1981
Letter, Unknown Author->A.P. Ershov, 10.01.1981
Letter, V. S. Oschepkov->A.P. Ershov, 12.01.1981
Letter (hand-written), Yu. I. Manin->A.P. Ershov, 15.01.1981Emotional reaction to the letter and the essay about E.Dijkstra
Letter (hand-written), I. Lomazova->A.P. Ershov, 19.01.1981
Letter (hand-written), Yu.A. Voronin->A.P. Ershov, 23.01.1981
Letter (hand-written), Unknown Author->A.P. Ershov, 23.02.1981Request for assistance in including the school informatics topic into cooperation arrangements; request to inform of the decision on the trip to Czechoslovakia
Covering letter, V. M. Savinkov->A.P. Ershov, 21.02.1981
Letter, I. Z. Tseitlin->A.P. Ershov, 01.03.1981
Letter, D. Yu. Grigoriev->A.P. Ershov, 03.03.1981
Letter, P. S. Lavrov->A.P. Ershov, 04.03.1981
Information letter, Organizing Committee->A.P. Ershov, 17.04.1981
Letter, A. N. Bykov->A.P. Ershov, 27.04.1981
Information letter, G. S. Pospelov->A.P. Ershov..., 15.05.1981
Covering letter, Karmanov->A.P. Ershov, 18.03.1981
Information letter, Unknown Author->A.P. Ershov, 05.06.1981
Information letter, G. K. Skryabin->A.P. Ershov, 08.07.1981
Letter (hand-written), T. Shevyakova->A.P. Ershov, 05.08.1981
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