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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
By
David Heineman
5 nov 2017
0
0
470
Data:
14 feb 1721 anni
14 feb 2018 anni
~ 297 years
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