for the article on the Congress.

on the programming at the IFIP 77 Congress.

on programming at the IFIP 77 Congress. Typewritten text.

as to reprinting Ershov's article on the Congress in a collection printed by "Statistika" Editing House: 1)the text of the article with handwritten modifications; 2)the experts' act; 3) the letter from the Editing House rejecting the article; 4) draft letter by Ershov on this subject (unfinished).

on the trip to Canada. Both handwritten and typewritten texts.

on results of A.P.Ershov's trip to Canada.