TY  - BOOK
AU  - Douglas, Biber
TI  - Longman student grammar of spoken and written English 
SN  - 0582237270
U1  - 423.5 
PY  - 2009///
CY  - Harlow
PB  - TP. Hồ Chí Minh
KW  - Grammar
KW  - English
N1  - 005973; X 216
ER  -