TY  - BOOK
AU  - Madan Mohan Singh.
TI  - Reference sources and services in library science
SN  - 978-93-5084-262-1
U1  - 025.52 
PY  - 2013///
CY  - New Delhi
PB  - Centrum Press
KW  - Referenc resources
KW  - Reference materials
ER  -