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SDNB
000 Generalities, Science004 Data processing Computer sciences080 General collections220 Bible360 Social services, association370 Education380 Commerce, communications, transport420 English439 Other Germanic languages510 Mathematics520 Astronomy & allied sciences621.3 Electrical Engineering, Electronics670 Manufacturing792 Stage presentations820 English & Old English literatures930 History of the ancient world950 General history of Asia Far East960 General history of Africa970 General history of North America990 General history of other areasS School books