TY  - BOOK
AU  - Shaheen M Mahmood, A.K.M Waliul Islam  
AU  - Shaheen M Mahmood, A.K.M Waliul Islam  
TI  - Certificate in English Language Proficiency. Vol-5    
U1  - 420/M215c 
PY  - 1994///
CY  -  Dhaka, 
PB  - Bangladesh Open University.
KW  - Shaheen M Mahmood, A.K.M Waliul Islam  
ER  -