Alexander Graham. "Memoir upon the formation of a deaf variety ofthe human race." Alexander Graham Bell Association for theDeaf, 1883. ^ Bruce 1990, pp. 410–417
^ a b c d Nielson 2006, p. F1-F4 ^ Lang, Harry G (2000). A phone of our own: thedeaf insurrection against Ma Bell. Washington, D.C.: Gallaudet University