Arithmetical abstractions ; the movement toward conceptual maturity under differing systems of instruction /
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| Format: | Book |
| Language: | English |
| Published: |
Berkeley :
University of California Press,
1967.
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| Series: | University of California publications in education ;
v. 17. |
| Subjects: |
| Item Description: | "Research ... supported under contract number 2-10-103 (project number 1676) with the United States Office of Education, Department of Health, Education, and Welfare." |
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| Physical Description: | x, 221 pages : illustrations ; 24 cm. |