"The Gallup Poll: Public Favors World Language as Aid to Permanent Peace", Box 1, Folder 5, Item 35
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 April 25, 2024.