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| 037 | _aTextual | ||
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_aeng _2eng |
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_a507, UNI _qFEDL |
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| 100 |
_aJohnson Philip G _9763818 |
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| 245 | 0 | _aScience facilities for secondary schools: Guiding principles and suggestions for planning and developing instructional for science teaching | |
| 260 |
_aWashington, USA _bU.S. Government Printing Office _c1956 |
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| 300 | _av,38p. | ||
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_cTEXL _h507, UNI |
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