to A.P. Ershov in connection with his scientific trip to Austria and France

for A.P. Ershov's scientific trip to Austria and France

for A.P. Ershov's visit to France

for the trip to France for participation in the IFIP WG meeting

for A.P. Ershov's business trip to France

Request for a medical certificate for the trip to France

on the Computing center's researchers' scientific travel to foreign research centers in 1979

of A.Ershov's visit to France