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020			_a0-521-38795-7
040			_cB000 _bspa
041			_aeng
050			_aP51 _bD48
245		4	_aThe development of second language Proficiency / _cEditado por Brigit Harley, Patrick Allen, Jim Cummins y Merrill Swain
250			_a1a
260			_aEstados Unidos : _bCambridge University Press, _c1990
300			_a248 p. : _c15 x 23 cm
490			_aCambridge Applied Linguistics
520			_aThis volume presents the results of a major investigation of second language proficiency in various groups of school age learners. The contributors, who are experts in the field of bilingual education and second language acquisition, address such issues as the nature of language proficiency, the impact of classroom practices on second language learning, the relationship between social-environmental factors and bilingual proficiency. This original collection of articles will be of interest to all those concerned with policy and practice in second language education.
650			_aLenguaje y lenguas _xEstudio y enseñanza _xCongresos _917322
650			_aAdquisición de segundo lenguaje _xCongresos _917323
700			_aHarley, Brigit _eeditor _97553
700			_aAllen, Patrick _eeditor _917324
700			_aCummins, Jim _eeditor _917325
700			_aSwain, Merrill _eeditor _917326
942			_2lcc _cBK
999			_c6287 _d6287