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_a507 _bINN |
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| 245 |
_aInnovations in science and technology education _cEdited by David, Layton _bVol. IV |
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| 260 |
_aBelgium _bUnesco _c1992 |
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| 300 | _a220p. | ||
| 546 | _aeng. | ||
| 650 |
_aScience-Study _914373 |
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| 700 |
_aLayton, David _912586 |
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| 942 | _cBK | ||
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_c10998 _d10998 |
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