TY  - BOOK
AU  - Singh M. P. Au.
TI  - Information sources and services: theeory
T2  - Singh's curriculum series of library and information science; 2
SN  - 978-93-9363-118-3 
PY  - 2022///
CY  - New Delhi, India
PB  - New Oxford Publishers and Distributors
KW  - Library ScinceInformation Resources
ER  -