The growth of intelligence in the pre-school years [videorecording].
Children from infancy to six years of age perform tasks designed by Jean Piaget and his collaborators which reveal how intellectual thought develops and manifests itself in early childhood.
| Awduron Eraill: | , |
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| Fformat: | Visual Material |
| Iaith: | English |
| Cyhoeddwyd: |
San Luis Obispo, CA
Davidson Films
c1972.
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| Pynciau: |