000 00662nam a2200169Ia 4500
008 241002s9999 xx 000 0 und d
020 _a9780521387958
040 _beng
082 _a418.007 D492 Ej.1
100 _aBirgit Harley y Ontario Institute for Studies in Education
245 4 _aThe Development of Second Language Proficiency
264 _b1990
_cCambridge University Press
300 _a248 páginas.
347 _aLibro
650 _aLanguage and languages Study and teaching Language and languages Study and teaching Congresses Langue seconde Acquisition Congrès Second language acquisition Second language acquisition Congresses
942 _cBK
999 _c1833
_d1833