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_2eng _aeng |
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| 082 | _a"T:520j2, L8/UN" | ||
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_aHeyneman Stephen P. etc. _9361460 |
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_aText books and achievement _b What we know |
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| 260 |
_aWashington _bWorld Bank U. S. A. _c1978 |
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| 300 |
_a34p. References : 32-34 _ccm. |
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| 490 | _aWorld Bank Staff Working Papers. 298. | ||
| 650 |
_a Education _9361461 |
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_aEducational Measurement _9361462 |
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