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_a540.7 _bCh517q |
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_aChemical educational material study _986657 |
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_aQuímica: Una Ciencia Experimental / _cChemical educational material study |
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_aSao Paulo : _bLivraria editora , _c1973 |
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| 300 | _a3 v. | ||
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_aQUIMICA - ENSEÑANZA _986658 |
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_aTABLA PERIODICA _986659 |
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