Classification
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550 - Earth sciences
7
808 - Rhetoric & collections of literature
7
174 - Occupational ethics
6
540 - Chemistry & allied sciences
6
551 - Geology, hydrology & meteorology
6
576 - Genetics & evolution
6
615 - Pharmacology & therapeutics
6
341 - Law of nations
5
351 - Public administration
5
430 - Germanic languages; German
5
491 - East Indo-European & Celtic languages
5
512 - Algebra
5
624 - Civil engineering
5
691 - Building materials
5
140 - Specific philosophical schools
4
342 - Constitutional & administrative law
4
345 - Criminal law
4
371 - Schools & their activities; special education
4
518 - Numerical analysis
4
519 - Probabilities & applied mathematics
4
543 - Analytical chemistry
4
572 - Biochemistry
4
612 - Human physiology
4
657 - Accounting
4
001 - Knowledge
3
003 - Systems
3
296 - Judaism
3
336 - Public finance
3
339 - Macroeconomics & related topics
3
343 - Military, tax, trade & industrial law
3
344 - Labor, social, education & cultural law
3
361 - Social problems & social welfare in general
3
501 - Philosophy & theory
3
516 - Geometry
3
520 - Astronomy & allied sciences
3
539 - Modern physics
3
580 - Plants (Botany)
3
690 - Buildings
3
791 - Public performances
3
910 - Geography & travel
3
000 - Computer science, information & general works
2
025 - Library operations
2
142 - Critical philosophy
2
374 - Adult education
2
509 - Historical, geographic & persons treatment
2
511 - General principles of mathematics
2
537 - Electricity & electronics
2
541 - Physical chemistry
2
547 - Organic chemistry
2
581 - Specific topics in natural history
2
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