TY  - BOOK
AU  - Harley,Birgit
ED  - Ontario Institute for Studies in Education
TI  - The development of second language proficiency
T2  - Cambridge applied linguistics series
SN  - 0521387957
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University
KW  - Language and languages
KW  - Study and teaching
KW  - Congresses
KW  - Second language acquisition
KW  - Bilingualism
N1  - Papers prepared for a symposium held at the Ontario Institute for Studies in Education, November 1987; Includes bibliographical references (p. 227-240) and index
ER  -