TY  - BOOK
AU  - Ali, Amjad 
TI  -  Reference service and the digital sources of information
SN  - 8170004128
U1  - 025.52 ALI 
PY  - 2004///
CY  - New Delhi
PB  - Ess Ess Publications,  
KW  -  Information retrieval
KW  - Information services
ER  -