Correlates of the concept assessment kit-conservation for educable mentally retarded children von Silverstein, A. B., Pearson, Linda Brownlee, Legutki, Greg

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Identity Conservation and Equivalence Conservation: A Question of Developmental Priority von Silverstein, A. B., Pearson, Linda Brownlee, Aguinaldo, Natalie E., Friedman, Stanley L., Takayama, Doris L., Weiss, Zvi I.

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