TY  - BOOK
AU  - Michael Swan
AU  - ,
TI  - Practical English Usage
SN  - 0194421465
U1  - 420 . 7  SWP 
PY  - 2000///
CY  - New Delhi
PB  - Oxford University Press
KW  - English Language- Study and teaching
N1  - E.Gram-Eng
ER  -