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1 Jan 1920 Jahr - The first classes for hard of hearing children are formed in Lynn, Massachusetts, and Rochester, New York; the term mentally retarded is introduced.
Zugefügt zum Band der Zeit:
History of special education
By
emeline
12 Aug 2019
0
0
2315
Datum:
1 Jan 1920 Jahr
Jetzt
~ 104 years ago
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