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		No cover image available Cognitive and achievement gains for kindergartners instructed in piagetian operations by Pasnak, Robert \| McCutcheon, Lynn \| [coaut.] \| Holt, Robert \| [coaut.]. Material type: Text; Format: print ; Literary form: Not fiction Availability: No items available.
		No cover image available Instruction on concrete operations for children who are mildly mentally retarded by Perry, Patricia \| Pasnak, Robert \| Holt, Robert W. Material type: Text; Format: print ; Literary form: Not fiction Availability: No items available.

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