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SDNB
000 Generalities, Science100 Philosophy150 Psychology200 Religion290 Other & comparative religions310 General statistics380 Commerce, communications, transport430 Germanic439 Other Germanic languages450 Italian, Romanian, Rhaeto-Romanic460 Spanish & Portugese languages470 Italic Latin480 Hellenic languages Classical Greek540 Chemistry & allied sciences660 Chemical engineering670 Manufacturing780 Music830 Literatures of Germanic languages839 Other Germanic literatures840 Literature of Romance languages860 Spanish & Portuguese literatures910 Geography & travel914.3 Geography & travel Germany970 General history of North America990 General history of other areas