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_aNational focus Group on teaching of mathematics. _lENG. |
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| 245 | _aNational focus Group on teaching of mathematics. | ||
| 250 | _a1st Ed. | ||
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_aN.Delhi : _bNCERT, _c2006. |
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_a21p. ; _c00 cm. |
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| 650 | _aEDUCATION. | ||
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