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SDNB
000 Generalities, Science090 Manuscripts & rare books220 Bible320 Political science330 Economics340 Law370 Education380 Commerce, communications, transport430 Germanic460 Spanish & Portugese languages490 Other languages500 Natural sciences590 Zoological sciences620 Engineering & allied operations624 Structural and Environmental Engineering660 Chemical engineering740 Drawing & decorative arts900 History970 General history of North America980 General history of South America