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| 037 | _aTextual | ||
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_aFEDL _beng _cFEDL |
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_aeng _2eng |
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_a507, BUT _qFEDL |
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| 100 |
_aButts David P _9769408 |
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| 245 | 0 | _aTeaching science in the elementary schoool | |
| 260 |
_aNew York, USA _bThe Free Press _c1973 |
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| 300 | _ax,199p. | ||
| 942 |
_cTEXL _h507, BUT |
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_c1366708 _d1366708 |
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