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SDNB
010 Bibliography020 Library & information sciences080 General collections200 Religion300 Social sciences330 Economics333.7 Natural resources, energy and environment390 Customs, etiquette, folklore460 Spanish & Portugese languages500 Natural sciences520 Astronomy & allied sciences530 Physics540 Chemistry & allied sciences600 Technology (Applied sciences)621.3 Electrical Engineering, Electronics650 Management & auxialiary services796 Athletic & outdoor sports & games800 Literature & rhetoric860 Spanish & Portuguese literatures960 General history of Africa980 General history of South America990 General history of other areasS School books