{{source}}First-order political boundaries in approximately January 1925. Accompanying dbf file shows status of each political unit. Disputed areas generally have their own polygons. Author of file is Sam Brown. Name of the shapefile is WorldBorders1925.shpArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/313735650e674f20b62f4ceeca131b5b_0engUniversity of Chicago Library GIS Data HubPublicWorld Borders 1925 [Illinois--Chicago]Web servicesIllinois--ChicagoIllinois1925