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SDNB
000 Generalities, Science130 Paranormal phenomena370 Education439 Other Germanic languages480 Hellenic languages Classical Greek490 Other languages520 Astronomy & allied sciences580 Botanical sciences590 Zoological sciences600 Technology (Applied sciences)620 Engineering & allied operations790 Recreational & performing arts810 American literature in English860 Spanish & Portuguese literatures880 Hellenic literatures Classical Greek960 General history of Africa990 General history of other areas