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SDNB
000 Generalities, Science090 Manuscripts & rare books200 Religion310 General statistics335 Military science450 Italian, Romanian, Rhaeto-Romanic550 Earth sciences560 Paleontology Paleozoology580 Botanical sciences590 Zoological sciences620 Engineering & allied operations660 Chemical engineering780 Music820 English & Old English literatures900 History920 Biography, genealogy, insignia960 General history of Africa980 General history of South America