"10 Weird Facts About Alexander Graham Bell's Obsession with Deaf People" by Mark Oliver (2019). https://listverse.com/2017/09/12/10-weird-facts-about-alexander-graham-bells-obsession-with-deaf-people/
Phillipson, DOnald J.c. "Alexander Graham Bell." The Canadian Encyclopedia. July 28, 2010. https://www.thecanadianencyclopedia.ca/en/article/alexander-graham-bell
The Bell Effect. https://thebelleffect.com/
"Signing, Alexander Graham Bell and the NAD" by Through Deaf Eyes. https://www.pbs.org/weta/throughdeafeyes/deaflife/bell_nad.html
"Bell, Alexander Graham." http://eugenicsarchive.ca/discover/tree/512eed4734c5399e2c000001
"The Real 'Toll' of A. G. Bell: Lessons about Eugenics" by Brain H. Greenwald in the Sign Language Studies, Vol. 9, No. 3 (Spring 2009), pp. 258-265, Gallaudet University Press.
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