Classification
363 - Other social problems & services
333 - Economics of land & energy
244
330 - Economics
199
320 - Political science
172
610 - Medicine & health
155
551 - Geology, hydrology & meteorology
102
600 - Technology
94
700 - The arts; fine & decorative arts
81
630 - Agriculture & related technologies
72
380 - Commerce, communications & transportation
58
000 - Computer science, information & general works
57
900 - History & geography
56
620 - Engineering & allied operations
55
140 - Specific philosophical schools
51
581 - Specific topics in natural history
48
340 - Law
38
370 - Education
34
628 - Sanitary & municipal engineering
28
304 - Factors affecting social behavior
26
500 - Natural sciences & mathematics
26
580 - Plants (Botany)
22
576 - Genetics & evolution
18
658 - General management
17
300 - Social sciences
15
170 - Ethics
12
327 - International relations
11
100 - Philosophy & psychology
10
720 - Architecture
10
336 - Public finance
9
540 - Chemistry & allied sciences
9
615 - Pharmacology & therapeutics
9
344 - Labor, social, education & cultural law
7
612 - Human physiology
7
800 - Literature & rhetoric
6
301 - Sociology & anthropology
5
400 - Language
5
414 - Phonology & phonetics
5
331 - Labor economics
4
338 - Production
4
361 - Social problems & social welfare in general
3
364 - Criminology
3
530 - Physics
3
550 - Earth sciences
3
657 - Accounting
3
200 - Religion
2
332 - Financial economics
2
360 - Social problems & services; associations
2
520 - Astronomy & allied sciences
2
590 - Animals (Zoology)
2
616 - Diseases
2
more ...