| Scientific Assignment, 13.02.1985 to academician A.P. Ershov going to Bulgaria for 7 days for participation in the international conference "Children in Computer World"
Letter, 13.02.1985
Letter, A. S. Alekseev->I. I. Nedlin, 13.02.1985
Reference, 13.02.1985
Justification, 13.02.1985of sending Acad. A.P. Ershov to Bulgaria
Telephone message, 08.02.1985
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