Letter, R. N. Ubell->A.P. Ershov, 18.01.1971
Letter, K. Samelson->A.P. Ershov, 19.01.1971
Letter, H. J. Bowlden->A.P. Ershov, 20.01.1971
Card, M. L. Juncosa->A.P. Ershov, 05.02.1971
List, Unknown Author->A.P. Ershov, 05.02.1971of literature for prof. Ershov.
Letter, M. Paul->A.P. Ershov, 28.01.1971
Letter, Ch. H. Lindsey->A.P. Ershov, 02.02.1971
Letter, 04.01.1971
Telegram, E. A. Feigenbaum->A.P. Ershov, 11.05.1971
List, 13.02.1971
Invoice, 15.02.1971
Telegram, A. Wijngaarden, van->A.P. Ershov, 19.02.1971Congratulations with being elected the Corresponding Member of the USSR AS
Letter, H. Bjork ->A.P. Ershov, 02.02.1971
Letter, F. L. Bauer ->A.P. Ershov..., 12.02.1971
Letter (hand-written), L. Zadeh->A.P. Ershov, 19.01.1971Thanks for the greetings; hope to meet again in New York; enclosed is an order form for the Algol 68 Report
Telegram, E. A. Feigenbaum->A.P. Ershov, 05.03.1971
Letter, B. Watkins->A.P. Ershov, 15.02.1971
Letter, J. T. Schwartz->A.P. Ershov, 17.02.1971concerning the visit to the USSR - the author would like to take his daughters with him
Invoice, 23.02.1971
Letter, Robert A. Freiburghouse->A.P. Ershov, 01.03.1971
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