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14 Feb 1954 Jahr - Kenneth Clark & Mamie Phipps Clark conduct studies of detrimental effects of racial segregation on African American children's self esteem, declaring that segrated schools is unconstitutional
Zugefügt zum Band der Zeit:
22 Jan 2018
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353
PYSCH 101
Datum:
14 Feb 1954 Jahr
Jetzt
~ 70 years ago