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| 041 | _aEnglish | ||
| 245 | 0 | _aResources for Chemistry Learning and Teaching | |
| 260 |
_aBangkok : _bUNESCO Principal Regional Office for Asia and the Pacific, _c1989 |
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_av, 123p.; _bill. _c27cm |
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| 650 | _aChemistry | ||
| 650 | _aReport | ||
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