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2. and , The Growth of Logical Thinking from Childhood to Adolescence, Basic Books, Inc., New York, 1958.
3. The Development and Evaluation of Self-Instructional Physical Science Materials Based on Piaget's Analysis of the Growth of Logical Thinking, Unpublished doctoral dissertation, University of Texas at Austin, 1968.
4. “Curriculum Research and the Promotion of Learning,” in and . Perspectives of Curriculum Evaluation, Rand McNally and Co., Chicago, 1967, 19–38.
5. Approaches to science education research: Analysis and criticism