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Sign language was used by the deaf, but wasn't widely used and varied between people. A larger use was for secret communication (8 сент 1620 г. – 8 сент 1720 г.)

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The Evolution of Sign Language

ByDavid Heineman

5 ноя 2017

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0

634

Дата:

8 сент 1620 г.

8 сент 1720 г.

~ 100 years

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