| Telegram, A.P. Ershov->H. Zemanek, 03.12.1979 "Anxious having no reply my invitation to conduct IFIP 80 Panel on qualified programmers."
Telegram and its translation, A.P. Ershov->S. C. Kleene, 07.09.1979on getting visa
Telegram and its translation, A.P. Ershov->S. C. Kleene, 06.09.1979regrets at the problem with his wife's visa and informs about attempts to solve it
Telegram, A.P. Ershov->F. H. Sumner, 03.12.1979asking consent to organize one more panel proposed by Miyamoto.
Letter, A.P. Ershov->D. E. Hamilton, 05.12.1979
Letter, A.P. Ershov->A. Wijngaarden, van, 13.08.1979writes about some practical aspects, such as blackboard, coloured chalk, overhead and sheduling
Letter, A.P. Ershov->M. S. Paterson, 25.07.1979invitation to be a guest of the USSR Academy of Sciences
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