Letter, B. A. Wichmann->A.P. Ershov, 06.01.1977
Telegram, A.P. Ershov->S. A. Schuman, 27.04.1977
Letter, A.P. Ershov->S. A. Schuman, 08.02.1977
Card, S. A. Schuman->A.P. Ershov, 17.02.1977
Letter, S. A. Schuman->Program Commitee Members, 18.02.1977
Telegram, A.P. Ershov->W. A. Wulf, 13.04.1976
Letter, S. A. Schuman->Program Commitee Members, 15.03.1977
Telegram, S. A. Schuman->A.P. Ershov, 22.02.1977
Letter, A.P. Ershov->S. A. Schuman, 25.02.1977
Letter, Kees Koster->Program Commitee Members..., 04.03.1977
Telegram, A.P. Ershov->J. J. Horning, 21.03.1977
Letter, A.P. Ershov->A. D. Smirnov, 08.04.1977
Letter, A.P. Ershov->A. A. Stogniy, 08.04.1977
Telegram, S. A. Schuman->A.P. Ershov, 05.03.1977
Telegram, S. A. Schuman->A.P. Ershov, 11.03.1977
Letter, A.P. Ershov->W. A. Wulf, 17.04.1976telling that the time has come to discuss the most pressing matters of the IFIP Working Conference
Letter, G. Goos->A.P. Ershov, 16.03.1977
Telegram, Kees Koster->A.P. Ershov, 24.03.1977The author accepte the invitation to the Conference and informs of the dates of his arrival to Moscow and departure from Novosibirsk
Telegram, A.P. Ershov->M. Paul, 03.04.1977
Telegram, A.P. Ershov->G. Goos, 05.04.1977
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