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The American Psychologist|December 7, 2023
Richard L. Miller (1945-2023)Kenneth D Keith, Bernard C Beins, William Wozniak
The Journal of Genetic Psychology|October 15, 2016
Early Tests of Piagetian Theory Through World War IIBernard C Beins
Mental Retardation|July 19, 2002
Comparing the quality of life of school-age children with and without disabilitiesSilvana M R Watson, Kenneth D Keith
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