| Program of A.Ershov's visit to England
Program, 13.02.1960of A.Ershov's and Ju. Cherevychnik's visit to Poland
Visit Programme, 10.07.1961(?)
Letter, S. L. Sobolev->M. A. Lavrentiev, 01.02.1962
Directions, S. L. Sobolev->A.P. Ershov, 01.02.1962
Instructions, S. L. Sobolev->A.P. Ershov, 01.02.1962to A.P. Ershov for participation in the 2nd IFIP Congress
Program, 03.03.1962of A.Ershov's visit to the USA
Program, 10.04.1962of A.Ershov's visit to the USA
Program, 09.01.1963of A.Ershov's visit to the USA (minimal and maximal length of time variants)
Justification, 06.05.1963of the trip to Italy for reading lectures and studying works in the theory of programming
Justification and Directions, 02.01.1964(?)
Jastification and Directions, 01.06.1964(?)
Covering letter with attachment, G. I. Marchuk->M. A. Lavrentiev, 03.08.1967informing of sending forward Ershov's foreign trip file for his prospecive visit to Mexico. Enclosed are the trip justification and directives
Letter with attachment, G. I. Marchuk->M. A. Lavrentiev, 27.04.1968
Letter with attachment, G. I. Marchuk->M. A. Lavrentiev, 15.05.1969
Item 11. (Name does not exist in this language.)
Traveller's documents, G. I. Marchuk->A.P. Ershov, 13.03.1970
Letter, 31.07.1970Request to exclude from the Soviet delegation to the Symposium on large systems (Warsaw, August 14-20, 1970)A.Ershov, who can not go due to the family matters
Official trip documents, 07.05.1971
Letter, G. I. Marchuk->M. A. Lavrentiev, 20.09.1971
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