"World Language Now Possible" SR Bulletin; "Universal RR Language Seen as War Result", Box 1, Folder 5, Item 55
Owen, Robert L. (Robert Latham), 1856-1947. "World Language Now Possible" SR Bulletin; "Universal RR Language Seen as War Result", Box 1, Folder 5, Item 55, Robert L. Owen Collection, 1913-1946. Carl Albert Congressional Research and Studies Center. https://fraser.stlouisfed.org/archival/5300/item/535439, accessed on April 24, 2024.