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SDNB
010 Bibliography030 General encyclopedic works050 General serials & their indexes060 General organization & museology070 News media, journalismn, publishing350 Public administration380 Commerce, communications, transport460 Spanish & Portugese languages500 Natural sciences620 Engineering & allied operations621.3 Electrical Engineering, Electronics650 Management & auxialiary services740 Drawing & decorative arts830 Literatures of Germanic languages900 History943 General history of Europe Central Europe Germany970 General history of North America980 General history of South America