Letter, A.P. Ershov->D. V. Speransky, 02.12.1971
Memo, A.P. Ershov->I. S. Fedorchenko, 27.10.1971
Letter, A.P. Ershov->L. D. Raikov, 02.12.1971
Letter, 03.12.1971
Letter, A.P. Ershov->B. V. Shabat, 03.12.1971
Letter, A.P. Ershov->A. A. Dorodnitsyn, 09.12.1971
Letter, A.P. Ershov->M. I. Nechepurenko, 13.12.1971
Letter, A.P. Ershov->G. Kh. Babich, 16.12.1971
Covering letter, A.P. Ershov->V. M. Glushkov, 20.12.1971
Letter, A.P. Ershov->V. A. Uspensky, 20.12.1971
Covering letter, A.P. Ershov->A. Z. Ryvkin, 25.12.1971to the manuscript by S.S.Lavrov, two reviews, and the manual on informatics published in West Germany with recommendation for its translation
Letter, A.P. Ershov->I. V. Klokachev, 29.12.1971
Letter, A.P. Ershov->V. Yu. Ivanitsky, 09.11.1971
Telegram, I.V. Pottosin->N. V. Shkut, 15.10.1971
Mailing list, 15.12.1971(?)
Letter, A.P. Ershov->V. I. Markov, 11.11.1971
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