TY  - BOOK
AU  - Swan 
AU  - Walter, Catherine
TI  - How English works : a grammar practice book 
SN  - 0194314561
U1  - 428 SWA 1997 
PY  - 1997///
CY  - Oxford
PB  - Oxford University Press
KW  - English
KW  - Study and teaching
N1  - Includes index
ER  -