Deborah
Jean Piaget
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Jean Paiget
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work sited
Work sited page
Oakes, Elizabeth H. "Piaget, Jean."
Science Online
. Facts On File, Inc. Web. 24 Apr. 2013. <http://www.fofweb.com/activelink2.asp?ItemID=WE40&SID=5&iPin=EWSR0707&SingleRecord=True>.