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SDNB
000 Generalities, Science030 General encyclopedic works420 English439 Other Germanic languages540 Chemistry & allied sciences560 Paleontology Paleozoology590 Zoological sciences620 Engineering & allied operations624 Structural and Environmental Engineering670 Manufacturing720 Architecture810 American literature in English839 Other Germanic literatures880 Hellenic literatures Classical Greek900 History960 General history of Africa980 General history of South America