TY  - BOOK
AU  - Harley, Birgit
TI  - The development of second language proficiency
SN  - 0521387957
U1  - 418.007 
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Language and languages
KW  - Study and teaching
KW  - Congresses
KW  - Second language acquisition
KW  - Bilingualism
KW  - Curriculum subjects
KW  - Foreign languages
KW  - Learning by students
KW  - Conference proceedings
N1  - 000501; CH 501
ER  -