Handbook of research on mathematics teaching and learning : a project of the National Council of Teachers of Mathematics /
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New York : Simon & Schuster Macmillan,
1992
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41
Prif Awduron: | , |
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Fformat: | |
Cyhoeddwyd: |
New York : Simon & Schuster Macmillan,
1992
|
Pynciau: |