TY  - BOOK
AU  - All India Library Conference
AU  - Ranganathan,S.R.
TI  - Depth classification and reference service and reference material 
U1  - 025.4 RAN  
PY  - 1953///.
CY  - Delhi : 
PB  - Indian Library Association, 
KW  - Library classification
KW  - Reference services
N1  - Includes index.
ER  -