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_aBausell R Barker _984481 |
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_aConducting meaningful experiments _b forty steps to becoming a scientist |
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_aCalifornia _bSage Publications USA _c1994 |
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_a146p _ccm. |
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| 650 | _a SOCIAL SCIENCES | ||
| 650 | _aRESEARCH METHODS | ||
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