Today's mathematics : A guide to concepts methods in elementary school mathematics
James W. Heddens.
Bok Språk ikke angitt 1964
| Utgitt | Chicago : Science Research Associates , 1964
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| Omfang | 488 s. 2 bl. : fig. tab.
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| Emner | |
| ISBN | 0471149845. - 9780471149842
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