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| 041 | _aspa | ||
| 082 | _a620 | ||
| 245 | 0 | _aCONSERVAS VEGETALES: DETERMINACION DE LA CONCENTRACION DEL ION HIDROGENO (PH) | |
| 250 | _a1A ED. | ||
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_aEcuador _bINEN _c1985 |
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| 260 | _aS.L. | ||
| 500 | _aD-14552 S/100 INEN BIBL. 28.06.94 NORMA INEN : 389 1985-12 general impreso DONACION | ||
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