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14 feb 1954 anni - 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
Aggiunto al nastro di tempo:
22 gen 2018
0
0
345
PYSCH 101
Data:
14 feb 1954 anni
Adesso
~ 70 years ago