TY  - BOOK
AU  - Swan,Michael
AU  - Baker,David
TI  - Grammar scan: diagnostic tests for practical English usage 
SN  - 9780194422741 (pbk.)
AV  - PE1112 S83 2008
PY  - 2008///
CY  - Oxford
PB  - Oxford University Press
KW  - Ingles
KW  - Gramática
KW  - English language
KW  - Grammar
ER  -