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Documents associated with Yu. A. Aivazyan Telegram, A.P. Ershov->Yu. A. Aivazyan, 21.03.1969 Letter, A.P. Ershov->I. N. Molchanov, 04.04.1969 Letter, E. L. Yuschenko->A.P. Ershov, 28.02.1969 The author asks A.P. Ershov to take part in writing articles for Encyclopedia of Cybernetics and to speak at the Yu.A. Aivazyan’s thesis defence.
Telegram, Yu. A. Aivazyan->A.P. Ershov, 21.03.1969asking what time is the most convenient to Ershov for the author’s visit to Novosibirsk.
Letter, I. N. Molchanov->A.P. Ershov, 25.03.1969Official notification of the time of thesis defence by Yu.A. Aivazyan.
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