TY  - BOOK
AU  - Adamson, H. D.
TI  - Interlanguage variation in theoretical and pedagogical perspective
SN  - 9780415538862
U1  - 401.93 
PY  - 2009///
CY  - New York
PB  - Routledge
KW  - Language and languages-Variation
KW  - Language and languages-Study and teaching
ER  -