TY  - BOOK
AU  - Thomson, A J .
AU  - Martinet,   A V .
ED  - Bangladesh railway dept.
TI  - A practical English grammar
SN  -  	0194313425; 9780194313421 
U1  - 425 
PY  - 1986///
CY  - Oxford : 
PB  - Oxford University Press, 
KW  -  English language;English language
ER  -