References
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- Gallaudet E. M. History of the College for the Deaf, 1857–1907. Gallaudet College Press, Washington, DC 1983
- Hewes G. W. Primate communication and the gestural origin of language. Current Anthropology 1973; 12: 5–24
- Rizzolatti G., Fadiga L., Gallese V., Fogassi L. Premotor cortex and the recognition of motor actions. Cognitive Brain Research 1996; 3: 131–141