000			00456nam a2200169Ia 4500
003			NIELib
008			211019s9999||||xx |||||||||||||| ||und||
020			_a0521387957
082			_a407.2 _bDEV
245			_aThe development of second language proficiency
260			_bCambridge, _c1990. _aNew York :
300			_axiv, 248p.; _c23cm
650			_aEnglish Language
700			_aHarley, Birgit _eEd.
700			_aAllen, Patrick _eEd.
942			_2ddc _cLM
999			_c33883 _d33883