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_aP 53 _bN87 1992 |
| 100 | 1 | _aNunan, David | |
| 245 | 1 | 0 | _aResearch methods in language learning |
| 260 |
_aReino Unido : _bCambridge University Press, _c1992 |
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| 300 |
_a249 p. : _btbs. ; _c23 cm. |
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| 440 | 0 | _aCambridge language teaching library | |
| 650 | 4 |
_aLenguaje y lenguas - _xEstudio y enseñanza - _xInvestigación -Metodología |
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