TY  - BOOK
AU  - Dewey, Melvil
AU  - Alahakoon, Uditha
TI  - DDC 23 - ඩිවි දශම වර්ගීකරණය
SN  - 9789557688152
U1  - 025.431 
PY  - 2017///
CY  - Gampaha
PB  - Nine Publishing 
KW  - Dewey Decimal Classification
KW  - Classification system
KW  - DDC 23
KW  - Library science
ER  -