TY  - GEN
AU  - Thomson, A.J.
AU  - Martinet, A.V.
TI  - A practical English grammar: structure drills 1
SN  - 0195636856
U1  - 425 
PY  - 1977///
CY  - Delhi
PB  - Oxford UP.
KW  - ENGLISH GRAMMAR
KW  - ENGLISH LANGUAGE
KW  - GRAMMAR
ER  -