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| User's Guide : Mental Retardation : Definition, Classification, and Systems of Supports, Tenth Edition |  | Borthwick-Duffy, Sharon, Wil Buntinx, Ruth Luckasson, Robert L. Schalock, Martha Snell, Marc Tasse, Michael L. Wehmeyer |  | AAIDD | Softcover | 2007 | 0940898950 |  | Developmental Disorders |  | price: $12.50 (in stock!) | | |
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