TY  - BOOK
AU  - Sardana,J L .
AU  - Sehgal,R L  .
TI  - Universal decimal classification : structure and methodology / 
U1  - 025.432 
PY  - 1983///
CY  - New Delhi : 
PB  - Ess Ess Publications , 
KW  - UDC
N1  - Includes index and bibliographical references
ER  -