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SDNB
000 Generalities, Science050 General serials & their indexes220 Bible340 Law420 English520 Astronomy & allied sciences530 Physics560 Paleontology Paleozoology621.3 Electrical Engineering, Electronics630 Agriculture660 Chemical engineering810 American literature in English830 Literatures of Germanic languages891.8 Slavic Literature970 General history of North America980 General history of South America