William Stokoe (1919-2000) is a renowned linguistics pioneer of American Sign Language (ASL) and is considered the "father of ASL linguistics" by the ASL/Deaf community of North America.
Maher, Jane and Oliver Sacks. Seeing in Sign: The Works of William Stokoe. 1996.
Lane, Harlan L. Recent Perspectives on American Sign Language. 1980.
Stokoe, William. Language in Hand: Why Sign Came Before Speech. 2001.
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bilingualism: a brainpower booster.