Classification
330 - Economics
144
320 - Political science
142
340 - Law
43
300 - Social sciences
39
360 - Social problems & services; associations
24
630 - Agriculture & related technologies
7
900 - History & geography
4
370 - Education
3
170 - Ethics
2
150 - Psychology
1
305 - Social groups
1
380 - Commerce, communications & transportation
1