Gannon, Jack. 1981. Deaf Heritage–A Narrative History of Deaf America, Silver Spring, MD: National Association of the Deaf, p. 55 (PDFArchived 2012-03-28 at the Wayback Machine)
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Gannon, Jack. 1981. Deaf Heritage–A Narrative History of Deaf America, Silver Spring, MD: National Association of the Deaf, p. 55 (PDFArchived 2012-03-28 at the Wayback Machine)