http://lod.ehri-project-test.eu/isCopyOfRelations/3701dc60-b272-11f0-9e71-e3b8a316d152 an entity of type: IsCopyOfRelation
"Census of the Jews of Budapest, 1941" was copied from "Budapest Székesfőváros Statisztikai Hivatalának iratai, 1870-1952"