TY  - BOOK
AU  - Swan, Michael
AU  - Walter, Catherine
TI  - How English Works a Grammar Practice Book with Answers 
SN  - 9780194314565
U1  - 428.24 
PY  - 2009///
CY  - Oxford : 
PB  - Oxford University Press, 
KW  - English Language Textbooks for Foreign Speakers
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/978-0-19-431456-5.pdf
ER  -