| Letter, W. Hoffmann->A.P. Ershov, 11.01.1959 Request 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, R. M. Karp ->A. A. Lyapunov, 23.01.1959on the advice by Prof. Ottinger the author sends his paper "Some Applications of Logical Syntax to Digital ComputerProgramming" to A.A. Liapunov and asks for the opinion. Apparently, since in a year the letter got to Ershov, Liapunov asked him to look at the paper.
Letter, D. V. Blake->A.P. Ershov, 27.01.1959
Letter, E. Fox->A.P. Ershov, 30.01.1959
Information, K. Samelson->A.P. Ershov..., 02.02.1959
Letter (hand-written), J. Raichl->A.P. Ershov, 05.02.1959
Letter, D. V. Blake->A.P. Ershov, 09.02.1959
Letter, C. J. Bielecki->A.P. Ershov, 16.02.1959
Letter, Unknown Author->A.P. Ershov, 18.02.1959
Letter (hand-written), D. Rutenberg->A.P. Ershov, 19.02.1959
Letter, E. J. Guerin->A.P. Ershov, 21.02.1959
Letter, E. Fox->A.P. Ershov, 25.02.1959
Letter (hand-written), M. Blaevoet->A.P. Ershov, 27.02.1959
Letter, J. McCarthy->A.P. Ershov, 02.03.1959Informing of sending some material; hopes for Ershov's summer visit to the USA.
Letter (hand-written), D. Rutenberg->A.P. Ershov, 10.03.1959
Letter, D. V. Blake->A.P. Ershov, 20.03.1959
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
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