| Photographs, 30.08.1981 A.P. Ershov and his Czechoslovakian colleagues on the trip from Bratislava to Tatry.
Photograph, 30.08.1981A.P. Ershov near a well during the trip from Bratislava to Tatry.
Photographs (на CD), 15.09.1981(?)S.Alenberg and A.Ershov at the MFCS-81 conference
Photograph, 15.09.1981(?)A.Ershov speaking at the MFCS-81 conference.
Photographs, 01.09.1978(?)A.Ershov and E.Dijkstra riding a tandem bicycle.
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