On the natural language of signs; and its value and uses in the instruction of the deaf and dumb. 1848.
Gallaudet
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D003638:Deafness / Q000266:history*; D004519:Education, Special / Q000266:history*; D049672:History, 19th Century; D006801:Humans; D009155:Mutism / Q000266:history*; D012813:Sign Language