Classification
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534 - Sound & related vibrations
1
536 - Heat
1
542 - Techniques, equipment & materials
1
553 - Economic geology
1
560 - Paleontology; paleozoology
1
575 - Specific parts of & systems in plants
1
578 - Natural history of organisms
1
579 - Microorganisms, fungi & algae
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
591 - Specific topics in natural history
1
592 - Invertebrates
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
624 - Civil engineering
1
628 - Sanitary & municipal engineering
1
639 - Hunting, fishing & conservation
1
640 - Home & family management
1
662 - Explosives, fuels & related products
1
664 - Food technology
1
665 - Industrial oils, fats, waxes & gases
1
668 - Technology of other organic products
1
670 - Manufacturing
1
671 - Metalworking & primary metal products
1
680 - Manufacture for specific uses
1
708 - Galleries, museums & private collections
1
711 - Area planning
1
778 - Fields & kinds of photography
1
780 - Music
1
785 - Ensembles with one instrument per part
1
803 - Dictionaries & encyclopedias
1
808 - Rhetoric & collections of literature
1
912 - Atlases, maps, charts & plans
1
938 - Greece to 323
1
940 - History of Europe
1
980 - History of South America
1