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SDNB
000 Generalities, Science100 Philosophy130 Paranormal phenomena200 Religion310 General statistics370 Education460 Spanish & Portugese languages470 Italic Latin500 Natural sciences540 Chemistry & allied sciences580 Botanical sciences620 Engineering & allied operations650 Management & auxialiary services690 Buildings780 Music800 Literature & rhetoric840 Literature of Romance languages990 General history of other areasB Fiction books