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| 005 | 20250508160218.0 | ||
| 008 | 008 250505s9999 xx 000 0 eng d | ||
| 037 | _aBooks to be hide in OPAC | ||
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_aFEDL _beng _cFEDL |
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| 041 |
_aeng _2eng |
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| 084 |
_a371.2, ILL/O _qFEDL |
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| 245 | 0 | _aRelation of size of class to school efficiency | |
| 260 |
_aUrbana _bThe University of Illinois _c1922 |
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| 300 | _a39p. | ||
| 942 |
_cHB _h371.2, ILL/O |
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| 999 |
_c1362704 _d1362704 |
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