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Institute
SDNB
000 Generalities, Science150 Psychology200 Religion300 Social sciences310 General statistics480 Hellenic languages Classical Greek491.8 Slavic languages510 Mathematics540 Chemistry & allied sciences621.3 Electrical Engineering, Electronics670 Manufacturing770 Photography & photographs780 Music840 Literature of Romance languages900 History943 General history of Europe Central Europe Germany970 General history of North America