TY  - BOOK
AU  - Harley,Birgit
AU  - ALLEN,Patrick
AU  - CUMMINS,Jim
AU  - SWAIN,Merrill
TI  - The development of second language proficiency
SN  - 0521387957
U1  - 420 
PY  - 1994///
CY  - New York
PB  - Cambridge university press
KW  - Language and languages -- Study and teaching -- Congresses
KW  - Second language acquisition -- Congresses
KW  - Language and languages -- Study and teaching
KW  - Second language acquisition
KW  - English language -- Study and teaching -- Foreign speakers
ER  -