TY  - BOOK
AU  - Swan, Michael.
AU  - Walter,Catherine
TI  - Oxford English grammar course: a grammar practice book for advanced students of English : with answers : advanced 
SN  - 9780194312509 (pbk.)
AV  - PE1128 .S972A
PY  - 2011///
CY  - Oxford
PB  - Oxford University Press
KW  - English language
KW  - Problems, exercises, etc
KW  - Textbooks for foreign speakers
KW  - Usage
ER  -