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| J Genet Psychol | 3 |
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Sullivan, Edmund V. – J Genet Psychol, 1969
Descriptors: Child Development, Cognitive Development, Conservation (Concept), Information Processing
Zern, David – J Genet Psychol, 1969
Descriptors: Child Development, Intellectual Development, Research Reviews (Publications), Statistical Analysis
Ai-Issa, Ihsan – J Genet Psychol, 1969
Descriptors: Child Development, Cognitive Development, Concept Formation, Developmental Psychology
