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SDNB
000 Generalities, Science010 Bibliography070 News media, journalismn, publishing200 Religion333.7 Natural resources, energy and environment370 Education380 Commerce, communications, transport530 Physics550 Earth sciences590 Zoological sciences660 Chemical engineering796 Athletic & outdoor sports & games800 Literature & rhetoric830 Literatures of Germanic languages850 Italian, Romanian, Rhaeto-Romanic literatures860 Spanish & Portuguese literatures990 General history of other areas