Letter
List
Terms of Agreement, 20.12.1965(?)
Postal Order Stub, 09.01.1973for 25.38 Roubles - author's fee; "Vestnik AN SSSR" journal,¹6, 1970.
List, 01.02.1973(?)of topics in "Sistemnoe Programmirovanie" journal
Letter, A. Lovejoy->A.P. Ershov, 31.03.1980
Letter with attachment, Yu. Bezborodov->A.P. Ershov, 12.06.1980
Letter with attachment, A. Lovejoy->A.P. Ershov, 25.07.1980
Letter, V. S. Semenov->A.P. Ershov, 13.08.1980
Letter, G. Ledin, Jr.->A.P. Ershov, 22.09.1980
Letter, 19.01.1981
Letter, L. D. Grigorieva->A.P. Ershov, 20.02.1981
Card, 26.03.1981
Letter, A. Lovejoy->A.P. Ershov, 30.03.1981
Letter, 08.04.1981
Letter, V. Sidorov->A.P. Ershov, 13.04.1981
Card, 14.05.1981
Letter (hand-written), A.P. Ershov->A. Lovejoy, 11.08.1981
Covering letter, 17.08.1981
Covering letter, A.P. Ershov->L. N. Vazhenina, 21.08.1981
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