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SDNB
004 Data processing Computer sciences030 General encyclopedic works100 Philosophy290 Other & comparative religions300 Social sciences320 Political science350 Public administration360 Social services, association450 Italian, Romanian, Rhaeto-Romanic570 Life science620 Engineering & allied operations630 Agriculture810 American literature in English910 Geography & travel930 History of the ancient world940 General history of Europe970 General history of North America