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| 245 | 0 | 0 | _aCrónica científica |
| 505 | 8 | 0 | _tLa materia orgánica en la industria moderna |
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_aIndustria _98547 |
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_tEl Monitor de la Educación Común _gAño 63, no. 855 (1944), p. 72-80 _dBuenos Aires : Consejo Nacional de Educación, 1944 |
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| 799 |
_a63 _n855 _f1944 |
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| 856 | 4 | _uhttp://www.bnm.me.gov.ar/ebooks/reader/reader.php?mon=1&vt=n&dir=00150943&c=0003&num_img=72&num_fin=80 | |
| 856 | _uhttp://www.bnm.me.gov.ar/giga1/monitor/monitor/855.pdf | ||
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