Classification
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341 - Law of nations
1
342 - Constitutional & administrative law
1
343 - Military, tax, trade & industrial law
4
350 - Public administration & military science
2
351 - Public administration
1
361 - Social problems & social welfare in general
2
363 - Other social problems & services
4
364 - Criminology
2
368 - Insurance
1
370 - Education
7
371 - Schools & their activities; special education
1
378 - Higher education
1
380 - Commerce, communications & transportation
4
384 - Communications; telecommunication
2
400 - Language
3
401 - Philosophy & theory
1
410 - Linguistics
2
414 - Phonology & phonetics
1
418 - Standard usage & applied linguistics
1
500 - Natural sciences & mathematics
11
501 - Philosophy & theory
5
502 - Miscellany
1
510 - Mathematics
5
511 - General principles of mathematics
1
512 - Algebra
3
514 - Topology
4
516 - Geometry
1
519 - Probabilities & applied mathematics
1
520 - Astronomy & allied sciences
9
530 - Physics
8
531 - Classical mechanics; solid mechanics
1
533 - Gas mechanics
1
540 - Chemistry & allied sciences
3
541 - Physical chemistry
9
543 - Analytical chemistry
1
546 - Inorganic chemistry
3
547 - Organic chemistry
11
548 - Crystallography
1
549 - Mineralogy
1
550 - Earth sciences
4
551 - Geology, hydrology & meteorology
4
560 - Paleontology; paleozoology
1
569 - Fossil mammals
1
570 - Life sciences; biology
17
571 - Physiology & related subjects
14
572 - Biochemistry
16
576 - Genetics & evolution
37
577 - Ecology
6
580 - Plants (Botany)
6
581 - Specific topics in natural history
2
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