Classification
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532 - Fluid mechanics; liquid mechanics
2
535 - Light & infrared & ultraviolet phenomena
2
612 - Human physiology
2
660 - Chemical engineering
2
720 - Architecture
2
781 - General principles & musical forms
2
100 - Philosophy & psychology
1
133 - Specific topics in parapsychology & occultism
1
146 - Naturalism & related systems
1
149 - Other philosophical systems
1
150 - Psychology
1
158 - Applied psychology
1
303 - Social processes
1
355 - Military science
1
364 - Criminology
1
372 - Elementary education
1
401 - Philosophy & theory
1
415 - Grammar
1
502 - Miscellany
1
520 - Astronomy & allied sciences
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
533 - Gas mechanics
1
536 - Heat
1
539 - Modern physics
1
540 - Chemistry & allied sciences
1
541 - Physical chemistry
1
542 - Techniques, equipment & materials
1
550 - Earth sciences
1
570 - Life sciences; biology
1
571 - Physiology & related subjects
1
602 - Miscellany
1
610 - Medicine & health
1
615 - Pharmacology & therapeutics
1
619 - [Unassigned]
1
628 - Sanitary & municipal engineering
1
671 - Metalworking & primary metal products
1
700 - The arts; fine & decorative arts
1
795 - Games of chance
1
796 - Athletic & outdoor sports & games
1