Card, 29.04.1959
Information, K. Samelson->A.P. Ershov..., 02.02.1959
Letter, W. Hoffmann->A.P. Ershov, 11.01.1959Request for help in finding out why the author had not received the letter by Academician Dorodnitsyn; informing of sending over some of the author's papers and asking Ershov so send him some of his works
Letter, D. V. Blake->A.P. Ershov, 27.01.1959
Letter, E. Fox->A.P. Ershov, 30.01.1959
Letter, C. J. Bielecki->A.P. Ershov, 16.02.1959
Letter, D. V. Blake->A.P. Ershov, 09.02.1959
Letter, E. J. Guerin->A.P. Ershov, 21.02.1959
Letter, E. Fox->A.P. Ershov, 25.02.1959
Letter, D. V. Blake->A.P. Ershov, 20.03.1959
Letter, J. McCarthy->A.P. Ershov, 02.03.1959Informing of sending some material; hopes for Ershov's summer visit to the USA.
Letter, D. V. Blake->A.P. Ershov, 24.03.1959
Letter, E. J. Guerin->A.P. Ershov, 01.04.1959
Letter, W. Hoffmann->A.P. Ershov, 02.04.1959
Letter, J. E. B. Winder->A.P. Ershov, 09.04.1959
Letter, A. J. Perlis ->A.P. Ershov, 24.04.1959
Letter, J. Carr III->A.P. Ershov, 15.05.1959
Letter, E. J. Guerin->A.P. Ershov, 19.05.1959
Letter, Unknown Author->A.P. Ershov, 18.02.1959
Letter, L. Kalmar->A.P. Ershov, 18.05.1959
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