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| 005 | 20250717121212.0 | ||
| 008 | 250401s1974 xx 000 0 eng d | ||
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_aE:215 _bL4 |
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| 100 | _aCoulson, C A | ||
| 245 | 0 | _aValence | |
| 260 |
_bEnglish Language Book Society, London _c1974 |
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| 300 | _a406 | ||
| 650 | _aChemistry | ||
| 653 | _aChemistry:Valence | ||
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| 999 |
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