TY  - BOOK
AU  - Kumar, P S G
TI  - Practical guide to DDC 20
SN  - 8171920004
U1  - 025.431 N0 
PY  - 1990///
CY  - Vasoyr
PB  - Datt sons Publishers
KW  - Library and Information science
KW  - Classification
KW  - Classification code
ER  -