TY  - BOOK
AU  - Christophersen,Paul
TI  - Second-language learning
SN  - 0140810528
U1  - 407.1 
PY  - 0000///197
CY  - Harmondsworth UK: 
PB  - Penguin Education
KW  - Language and languages - Study and teaching
KW  - Language acquisition
KW  - English language - Study and teaching - Foreign speakers
KW  - Linguistics - Study and teaching
ER  -