Letter, D. G. Hays->A.P. Ershov, 30.05.1973
Telegram, 19.07.1973
Letter, B. Kendzya->A.P. Ershov, 14.06.1973
Letter, J. Loeckx->A.P. Ershov, 22.06.1973
Letter (hand-written), R. K. Shyama->A.P. Ershov, 27.06.1973
Letter, A. N. Doering->A.P. Ershov, 07.06.1973
Card, M. S. Paterson ->A.P. Ershov, 20.07.1973With Compliments.
Letter, R. Uzgalis->o the members of IFIP WG 2.1, 13.07.1973
Letter, P. Calingaert->A.P. Ershov, 10.07.1973
Card, 23.07.1973With Compliment.
Letter, E. I. Organick ->A.P. Ershov, 11.07.1973
Letter, C. L. Smith->A.P. Ershov, 08.10.1973The author asks to send him any publications concerning a development of an internal language representation for ALGOL 68, PL/1 and SIMULA (for any cost).
Letter, J. Belzer ->A.P. Ershov, 25.07.1973
Letter, P. J. Claringbold->A.P. Ershov, 18.07.1973
Letter, M. C. Ashill->A.P. Ershov, 06.08.1973
Post card, J. McCarthy->A.P. Ershov, 21.07.1973
Letter, K. L. Koffeman->A.P. Ershov, 23.07.1973
Telegram, J. F. Traub->A.P. Ershov, 06.08.1973
Letter, M. V. Malin->A.P. Ershov, 13.07.1973
Letter, P. Brinch-Hansen->A.P. Ershov, 01.06.1973
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