Agenda, V.S.Grigoriev->A.P. Ershov, 04.10.1984
Brochure, 12.09.1979
Information
Invitation, 29.09.1975
Invitation, Organizing Committee->A.P. Ershov, 15.03.1971
Invitation, Yu, E. Nesterikhin->A.P. Ershov, 20.03.1979
Invitation, 27.04.1979
Invitation, V. E. Kotov->A.P. Ershov, 03.12.1986
Invitation, 21.12.1975
Letter, V. V. Shaydurov->A.P. Ershov, 01.02.1974(?)
Letter, 16.12.1974
Notification, 02.06.1972
Notification, 26.09.1980
Proof, 25.04.1983of the article "40 years later, 30 years later, 20 years later...TODAY!" in memory of an outstanding engineer and great patriot N.I. Bessonov (with Ershov's hand-writted addition "From Karl Efimovich Levitin, July 6, 1983 (Protvino)")
Telephone Message, G. I. Marchuk->I.V. Pottosin, 13.02.1974
Telephone Messages, N. F. Niznaiko ->A.P. Ershov..., 29.11.1986
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