Owen, Robert L. (Robert Latham), 1856-1947. "The Gallup Poll: Public Favors World Language as Aid to Permanent Peace", Box 1, Folder 5, Item 35,
Robert L. Owen Collection, 1913-1946.
Carl Albert Congressional Research and Studies Center.
https://fraser.stlouisfed.org/archival/5300/item/535414, accessed on January 23, 2026.