Classification
320 - Political science
330 - Economics
34
630 - Agriculture & related technologies
8
300 - Social sciences
5
100 - Philosophy & psychology
4
140 - Specific philosophical schools
3
370 - Education
3
170 - Ethics
2
200 - Religion
2
610 - Medicine & health
2
900 - History & geography
2
340 - Law
1
363 - Other social problems & services
1
700 - The arts; fine & decorative arts
1