TY  - BOOK
AU  - Duckworth,Michael
TI  - Grammar and practice / 
SN  - 0194570681   
PY  - 1995///
CY  - Oxford
PB  - Oxford university Press, 
KW  - English language
KW  - Grammar
KW  - Problems,exercises
N1  - Includes bibliographical reference and index
ER  -