TY  - BOOK
AU  - Swan, Michael
TI  - Practical English Usage
SN  - 019567989X
U1  - 425  SWA 
PY  - 2005///
CY  - New Delhi
PB  - Oxford University Press
KW  -  Practical
KW  -  Usage
KW  - English
N1  - English grammar(425)
ER  -