Classification
610 - Medicine & health
693
330 - Economics
126
363 - Other social problems & services
84
370 - Education
83
700 - The arts; fine & decorative arts
58
380 - Commerce, communications & transportation
56
600 - Technology
55
620 - Engineering & allied operations
55
100 - Philosophy & psychology
30
333 - Economics of land & energy
27
000 - Computer science, information & general works
24
612 - Human physiology
24
170 - Ethics
23
140 - Specific philosophical schools
22
616 - Diseases
22
362 - Social welfare problems & services
20
530 - Physics
20
361 - Social problems & social welfare in general
19
340 - Law
15
580 - Plants (Botany)
15
551 - Geology, hydrology & meteorology
13
576 - Genetics & evolution
11
500 - Natural sciences & mathematics
10
519 - Probabilities & applied mathematics
10
300 - Social sciences
8
540 - Chemistry & allied sciences
8
900 - History & geography
8
331 - Labor economics
7
613 - Personal health & safety
7
615 - Pharmacology & therapeutics
7
001 - Knowledge
6
320 - Political science
6
306 - Culture & institutions
5
572 - Biochemistry
5
305 - Social groups
4
523 - Specific celestial bodies & phenomena
4
570 - Life sciences; biology
4
621 - Applied physics
4
304 - Factors affecting social behavior
3
338 - Production
3
539 - Modern physics
3
571 - Physiology & related subjects
3
614 - Incidence & prevention of disease
3
630 - Agriculture & related technologies
3
658 - General management
3
660 - Chemical engineering
3
006 - Special computer methods
2
050 - General serial publications
2
070 - News media, journalism & publishing
2
174 - Occupational ethics
2
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