Archive
Correspondence
Incoming mail (1977)
Letter (hand-written), I. V. Velbitsky->A.P. Ershov, 18.01.1977
Letter, A.N.Popsuev->A.P. Ershov, 05.01.1977
Letter, A. N. Zvonova->A.P. Ershov, 25.10.1977
Covering letter, V. A. Yakovlev->A.P. Ershov, 12.05.1977
Letter, V. P. Shirikov->A.P. Ershov, 08.06.1977
Letter, 18.10.1977
Letter, A. N. Terekhov->A.P. Ershov, 23.06.1977

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