TY  - GEN
AU  - Thomson , A.J. 
AU  - Martinet , A.V.
TI  - A Practical english grammar: exercises 1
SN  - 9780195620542
U1  - 425 
PY  - 1986///
CY  - New Delhi
PB  - Oxford University Press
KW  - ENGLISH LANGUAGE
KW  - ENGLISH GRAMMAR PRACTICE
KW  - WRITING AND SPEAKING
ER  -