TY  - GEN
AU  - Thomson,A.J.
AU  - Martinet,A.V.
TI  - A practical english grammar
SN  - 9780195620535
U1  - 425 
PY  - 1986///
CY  - New Delhi
PB  - Oxford University Press, 
KW  - Structural system
KW  - English language--Grammar
ER  -