(Encyclopedia) Piaget, JeanPiaget, JeanzhäNpyäˈjā [key], 1896–1980, Swiss psychologist, known for his research in developmental psychology. After receiving a degree in zoology from the Univ. of…
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The Presidential Gallery An illustrated guide to the presidents of the United States [ Go to the First Ladies Gallery or the Presidential Factfile! ] Barack Obama2009–…
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