"Owen's Alphabet" School and Society; "A New Educational Program for Indians in Peru" School and Society; "Global Alphabet" Baltimore Sun, Box 1, Folder 5, Item 46
Pei, Mario, 1901-1978 and Holdeen, Jonathan. "Owen's Alphabet" School and Society; "A New Educational Program for Indians in Peru" School and Society; "Global Alphabet" Baltimore Sun, Box 1, Folder 5, Item 46, Robert L. Owen Collection, 1913-1946. https://fraser.stlouisfed.org/archival/5300/item/535425, accessed on May 4, 2024.