"Eugenics Tree" (1923). Credit: Wisconsin Historical Society. https://www.wisconsinhistory.org/Records/Image/IM101667
Biesold, Horst, & Friedlander, Henry. (1999) Crying Hands: Eugenics and Deaf People in Nazi Germany. Washington: Gallaudet University Press.
Ryan, Donna F., et al. (2002) "Deaf people in Hitler's Europe". Gallaudet University Press.
Ryan, Donna F. (2005) "Deaf people in Hitler's Europe: conducting oral history interviews with deaf Holocaust survivors." University of California Press.
"Zoom Focus: Confession: An historical drama set during Victorian England." Short film with English subtitle about Alexander G. Bell's propaganda for a ban on sign language and marriage of Deaf couples in the 19th century.
"Deaf Holocaust." https://www.youtube.com/watch?v=5CQ8BSHdyeU
"The Deaf Princess Who Saved Jews from the Holocaust." https://www.youtube.com/watch?v=pKCLS_4r8O4
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