For research and information on British Sign Language, below are some resources.
Brennan, Mary. "Grammatical Processed in British Sign Language." Perspectives on British Sign Language and Deafness. Eds. Bencie Woll, James Kyle, and Margaret Deuchar. London: Croom Helm, 1981.
Deuchar, Margaret. "Variation in British Sign Language." Perspectives on British Sign Langauge and Deafness. Eds. Bencie Woll, James Kyle, and Margaret Deuchar. London: Croom Helm, 1981.
Sign Community. "A Brief History of British Sign Language (BSL)" http://www.signcommunity.org.uk/a-brief-history-of-british-sign-language-bsl.html
British Deaf Association. "British Sign Language History." http://www.signcommunity.org.uk/a-brief-history-of-british-sign-language-bsl.html
Related languages: Australian Sign Language known as Auslan.
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