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| 008 | 981208s1970 maua 001 0 eng | ||
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| 100 | 1 | _aSund, Robert B. | |
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_aElementary science discovery lessons / _cby Robert B. Sund, Bill W. Tillery and Leslie W. Trowbridge |
| 260 |
_aBoston, MA : _bAllyn and Bacon, _c1970 |
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_a3 v. : _bill. ; _c22 cm. |
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| 650 | 0 |
_aScience _xStudy and teaching (Elementary) |
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| 700 | 1 | _aTillery, Bill W. | |
| 700 | 1 | _aTrowbridge, Leslie W. | |
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_a.b10658464 _b2021-05-28 _c2019-11-12 |
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