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Article, 06.03.1985
Article, 06.05.1987
Article, 15.10.1985
Covering letter, V. B. Dralyuk->A.P. Ershov, 06.05.1987
Information letter, L. I. Narysheva->A.P. Ershov, 10.02.1985
Letter, V. B. Dralyuk->A.P. Ershov, 04.02.1983
Letter, V. B. Dralyuk->A.P. Ershov, 06.03.1985
Letter, V. B. Dralyuk->A.P. Ershov, 20.12.1986(?)
Personal plan, 01.11.1982-01.11.1986
Review, 01.12.1987
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