Letter, W. M. Turski->A.P. Ershov, 05.11.1981
Item 60. (Name does not exist in this language.)
Item 61. (Name does not exist in this language.)
Letter, S. C. Kleene ->A.P. Ershov, 31.12.1981with corrections to the author's paper "Origins of Recursive Function Theory".
Letter, W. H. Wimmers->A.P. Ershov, 31.12.1981"On March 1, 1982, I shall retire from my present position as President of North-Holland Publishing Company."
Copied Newspaper, 25.12.1981"The Family News", a mock Christmas edition of J.B.Dennis' family.
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