ඩිවි දශම වර්ගීකරණය
ඩිවි දශම වර්ගීකරණය (DDC), or Dewey Decimal System, is a proprietary library classification system first published in the United States by Melvil Dewey in 1876.
ඩිවි දශම වර්ගීකරණය (DDC), or Dewey Decimal System, is a proprietary library classification system first published in the United States by Melvil Dewey in 1876.