TY  - BOOK
AU  - Swan,Michael
TI  - Learner English: A Teacher's Guide to Interference and Other Problems 
SN  - 9780521779395
AV  - PE1128.A2 . L36 2001
PY  - 2001///
CY  - New York.
PB  - Cambridge،
KW  - English Language--
KW  - Study and teaching-Foreign Speakers
KW  - Interference
ER  -