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| 082 | _aFil.509/C76s/c.2 | ||
| 100 | _aAntonio P. Contreras et. Al | ||
| 245 | 0 | _aScience, technology and society ( a practical approach ) | |
| 260 | _bMindshapers Co. Inc. | ||
| 490 | _vc.2 | ||
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