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1 ene 1920 año - The first classes for hard of hearing children are formed in Lynn, Massachusetts, and Rochester, New York; the term mentally retarded is introduced.
Añadido al timeline:
History of special education
By
emeline
12 ago 2019
0
0
2314
fecha:
1 ene 1920 año
Ahora mismo
~ 104 years ago
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