| Letter (hand-written), J. McCarthy->A.P. Ershov, 15.02.1967 the author tells about his work and current affairs, hopes that Ershov will succeed in arranging his visit to Novosibirsk in 1968-69
Information, 02.03.1967
Telegram, M. P. Chinitz->A.P. Ershov, 09.03.1967
Letter, M. Engeli->A.P. Ershov, 24.02.1967
Letter, J. Kral->A.P. Ershov, 21.02.1967
Covering letter, F. Ercek->A.P. Ershov, 21.02.1967
Letter, S. Zasloff ->A.P. Ershov, 20.02.1967
Information letter, L. Iliev->A.P. Ershov, 01.02.1967
Letter, A. C. Oettinger->A.P. Ershov, 23.02.1967
Letter, J. T. Schwartz->A.P. Ershov, 28.02.1967
Letter, S. D. Duyverman ->A.P. Ershov, 14.03.1967
Letter with attachment, J. B. Dennis->A.P. Ershov..., 13.03.1967(?)
Letter, J. Minker->A.P. Ershov, 01.03.1967
Letter, A. Wijngaarden, van->A.P. Ershov, 13.03.1967
Letter, W. M. Turski->A.P. Ershov, 15.03.1967
Letter, M. Mahmarian->A.P. Ershov, 20.03.1967
Covering letter, J. K. Burgess->A.P. Ershov, 20.02.1967
Letter, P. Tellefsen->A.P. Ershov, 23.03.1967
Letter, N. V. Findler->A.P. Ershov, 22.03.1967
Letter, D. G. Hays->A.P. Ershov, 27.03.1967
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