TY  - BOOK
AU  - Rao, V.A. Seshagiri 
TI  - Step by Step Classification : : (formula based classification) 
SN  - 9788193359792
U1  - 025.42 
PY  - 2017///
CY  - New Delhi
PB  - Ess Ess Publication
KW  - Library operations
ER  -