Thomas, Elmer, 1876-1965. Global Phonetic Alphabet : Extension of Remarks of Hon. Elmer Thomas of Oklahoma in the Senate of the United States, Box 1, Folder 5, Item 42,
Robert L. Owen Collection, 1913-1946.
https://fraser.stlouisfed.org/archival/5300/item/535421, accessed on January 14, 2026.