TY  - BOOK
AU  - Swan, Michael
TI  - How english works : a grammar practice book
T2  - With answers) by swan, michael, walter, catherine (1997
PY  - 1996///
CY  - Oxford
PB  - Oxford University Press
UR  - http://www.amazon.com/exec/obidos/ASIN/B00DO8NY12/chopaconline-20
ER  -