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SDNB
000 Generalities, Science070 News media, journalismn, publishing220 Bible310 General statistics333.7 Natural resources, energy and environment335 Military science390 Customs, etiquette, folklore420 English439 Other Germanic languages460 Spanish & Portugese languages470 Italic Latin490 Other languages540 Chemistry & allied sciences550 Earth sciences600 Technology (Applied sciences)620 Engineering & allied operations621.3 Electrical Engineering, Electronics624 Structural and Environmental Engineering630 Agriculture690 Buildings780 Music850 Italian, Romanian, Rhaeto-Romanic literatures910 Geography & travel914.3 Geography & travel Germany940 General history of Europe980 General history of South America