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An investigation of the influence of two different elementary school science programs on the intellectual development of sixth-grade children using Piaget-type tasks
Dissertation

An investigation of the influence of two different elementary school science programs on the intellectual development of sixth-grade children using Piaget-type tasks

Gerald Herman Hansen
University of Iowa
Doctor of Philosophy (PhD), University of Iowa
1973
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7330926
Embargoed Access, Embargo ends: 01/01/2069

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