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_a540.712 _bHAE |
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_aHafizud Din _9289961 |
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_aEffectiveness of problem based teaching on students achievements and conceptual understanding in chemistry at secondary level in Chitral _b: MPhil Science Education _cHafizud Din |
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_aIslamabad: _bAllama Iqbal Open University, _c2021. |
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| 300 | _a83p. | ||
| 500 | _aHB | ||
| 546 | _aEng | ||
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_aChemistry-Study and teaching-Secondary level _9289962 |
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_aDissertations, Academic--MPhil Science Education _9289963 |
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| 700 |
_aSupervised by Iqbal Shah, Dr. _9143786 |
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