TY  - GEN
AU  - Singh, Gurudev
TI  - Information Sources, Services, and Systems
SN  - 9788120346390
U1  - 025.17 
PY  - 2013///
CY  - Delhi
PB  - PHI Private Limited
KW  - Library Science
KW  - Information Sources, Services
N1  - 1. Information Source
2. Kinds of Reference Books and Their Evaluation
3.Dictionaries
4.Encyclopaedias
5. Statistical Sources
6. Patents and Standards
ER  -