request to acknowledge the receipt of formal invitation

Cotton picking in the Frunze collective farm near Khiva; D.Knuth, S.Kleene

thanks for invitation, plans to come with his wife and asks if it is possible to use his account in the USSR (royalties) in paying his living and travel expenses

Banquet; To the left - S.Kleeene; toasting - A.Ershov, next to him - H.Zemanek

invitation to be a guest of the Academy of Sciences; with the author's remarks concerning each addressee

typed copy of the paper

about misprints found in the Springer publishing of the paper

translation into Russian by G. V. Sheina

Urgench, reception at the UzSSR AS; dancing - Kleene and Kapitonova

thanks for his visa to USSR but is surprised not to receive a visa for his wife

Khiva, summer hall; A.Mazurkiewicz, Z.Pavlak, E.Specker, S.Kleene, D.Kleene, A. vanWijngaarden

formal invitation to be a guest of the USSR AS

kind request for information on arrival and reservations

wants to come but has to seek for financial support

about practical problems

request for paying royalties to S. Kleene and D. Knuth

typed copy of the paper

translation into Russian by N. V. Belyakina