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Sign language is used by almost every deaf person as a means of communication (14 feb 1721 anni – 14 feb 2018 anni)

Aggiunto al nastro di tempo:

The Evolution of Sign Language

ByDavid Heineman

5 nov 2017

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633

Data:

14 feb 1721 anni

14 feb 2018 anni

~ 297 years

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