TY  - BOOK
AU  - Thomson, A.J.
AU  - Martinet, A.V.
TI  - A Practical English Grammar Exercises 1
SN  - 0195620542
U1  - 425 
PY  - 1998///
CY  - Oxford University Press
PB  - Delhi
KW  - Grammar Of satandard english
ER  -