TY  - BOOK
AU  - Swan,Michael
TI  - Practical English Usage
SN  - 0194311988
U1  - 420 
PY  - 2001///
CY  - Oxford
PB  - Oxford university press
KW  - English language -- Study and teaching
KW  - English language
N1  - 4516 Third edition Fully revised.edition 2009
ER  -