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| 037 | _gU. S. I. S. | ||
| 037 | _nU. S. I. S. | ||
| 040 | _beng | ||
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| 082 | _a607 | ||
| 100 | _aHurd | ||
| 245 | _aNEW DIRECTIONS IN TEACHING SECONDARY SCHOOL SCIENCE | ||
| 260 | _c1976/06/17 | ||
| 300 | _g0 | ||
| 365 | _b15 | ||
| 590 | _aAvailable-Active | ||
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| 650 | _aTechnology (applied Sciences) | ||
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