Card, G. R. Gromov->A.P. Ershov, 09.03.1983
Card, V. A. Uspensky->A.P. Ershov, 26.03.1983
Card, V.V. Atayan->A.P. Ershov, 05.08.1983
Covering letter, Yu. Yaaksoo->A.P. Ershov, 21.01.1983
Covering letter, E.S. Kuzin->A.P. Ershov, 28.01.1983
Covering letter (hand-written), S. S. Lavrov->A.P. Ershov, 14.03.1983
Covering letter, E.V. Dvornikov->A.P. Ershov, 02.04.1983
Covering letter, A. V. Anisimov->A.P. Ershov, 25.04.1983to the dissertation with brief comments and the request to be an official opponent
Covering letter (hand-written), S. A. Romanenko->A.P. Ershov, 07.05.1983
Covering letter, P.I. Mikheev->A.P. Ershov, 14.05.1983
Covering letter, V.D. Yermikov->A.P. Ershov, 14.06.1983
Covering letter, G.M. Pogosyants->A.P. Ershov, 02.08.1983
Covering letter (hand-written), S. V. Klimenko->A.P. Ershov, 22.09.1983
Covering letter, V. P. Kupriyanov->A.P. Ershov, 08.12.1983
Covering letter, Unknown Author->A.P. Ershov, 09.12.1983
Covering letter, A. V. Anisimov->A.P. Ershov, 26.12.1983
Information letter, A. A. Samarsky ->A.P. Ershov, 04.01.1982
Information letter, I. Sildmae->A.P. Ershov, 27.01.1983
Information letter, D.A. Pospelov->A.P. Ershov, 08.02.1983
Information letter, Unknown Author->A.P. Ershov, 09.12.1983
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