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SDNB
000 Generalities, Science070 News media, journalismn, publishing230 Christian theology330 Economics333.7 Natural resources, energy and environment335 Military science390 Customs, etiquette, folklore420 English439 Other Germanic languages460 Spanish & Portugese languages490 Other languages600 Technology (Applied sciences)621.3 Electrical Engineering, Electronics624 Structural and Environmental Engineering630 Agriculture650 Management & auxialiary services690 Buildings860 Spanish & Portuguese literatures910 Geography & travel940 General history of Europe