Owen, Robert L. (Robert Latham), 1856-1947. "Alphabet is Devised for All-World Use" The New York Times, Box 1, Folder 5, Item 18, Robert L. Owen Collection, 1913-1946. Carl Albert Congressional Research and Studies Center. https://fraser.stlouisfed.org/archival/5300/item/535397, accessed on September 24, 2024.