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SDNB
000 Generalities, Science060 General organization & museology300 Social sciences320 Political science390 Customs, etiquette, folklore540 Chemistry & allied sciences550 Earth sciences560 Paleontology Paleozoology570 Life science600 Technology (Applied sciences)620 Engineering & allied operations660 Chemical engineering791 Public performances830 Literatures of Germanic languages920 Biography, genealogy, insignia