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SDNB
200 Religion320 Political science333.7 Natural resources, energy and environment340 Law360 Social services, association370 Education480 Hellenic languages Classical Greek500 Natural sciences520 Astronomy & allied sciences621.3 Electrical Engineering, Electronics720 Architecture780 Music791 Public performances840 Literature of Romance languages940 General history of Europe970 General history of North America990 General history of other areas