Classification
610 - Medicine & health
304 - Factors affecting social behavior
90
330 - Economics
39
333 - Economics of land & energy
24
320 - Political science
22
370 - Education
21
600 - Technology
11
380 - Commerce, communications & transportation
5
170 - Ethics
4
363 - Other social problems & services
4
100 - Philosophy & psychology
3
900 - History & geography
3
140 - Specific philosophical schools
2
300 - Social sciences
2
340 - Law
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
301 - Sociology & anthropology
1
336 - Public finance
1
338 - Production
1
630 - Agriculture & related technologies
1
658 - General management
1