TY  - BOOK
AU  - Swan,Michael
AU  - Walter,Catherine
TI  - How English works: a grammar practice book with answers 
SN  - 0194314561(with answers)
PY  - 1997///
CY  - Oxford
PB  - Oxford University Press
KW  - English language
KW  - Textbooks for foreign speakers
KW  - Grammar
KW  - Handbooks, manuals, etc
ER  -