TY  - BOOK
AU  - Thomson, A.J. ;
AU  - Martinet,  A.V. ;
TI  - A practical English grammar : exercises 1
SN  - 0195620542 
U1  - 425 
PY  - 1986///
CY  - Delhi
PB  - Oxford University Press
KW  - English language -- Grammar -- Problems, exercises, etc
KW  - English language Grammar
ER  -