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_a371.33 _bSCH 1968 |
| 100 | 1 | _aSchain, Robert | |
| 245 | 1 | 0 |
_aObtención y empleo de medios de enseñanza económicos y gratuitos _cRobert Schain |
| 264 |
_aMéxico _bHispanoamericana _c1968 |
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| 300 | _a50 p. | ||
| 650 | 4 |
_aEducación _xmateriales visuales |
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| 650 | 4 | _aMétodos de enseñanza | |
| 905 | _aLibros | ||
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| 950 | _c20021023 | ||
| 950 | _c20060109 | ||
| 950 | _c20090330 | ||
| 950 | _c20090330 | ||
| 950 | _c20111027 | ||
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