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  1. 21
    Published 1963
    Book

    An analysis of new mathematics programs.
  2. 22
    Published 1960
    Book

    Instruction in arithmetic.
  3. 23
    Published 1959
    Book

    The Growth of mathematical ideas, grades K-12.
  4. 24
    Published 1953
    Book

    The learning of mathematics its theory and practice
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