Classification
320 - Political science
330 - Economics
214
300 - Social sciences
60
900 - History & geography
51
333 - Economics of land & energy
25
576 - Genetics & evolution
24
630 - Agriculture & related technologies
12
340 - Law
8
304 - Factors affecting social behavior
6
363 - Other social problems & services
6
610 - Medicine & health
6
170 - Ethics
3
100 - Philosophy & psychology
2
200 - Religion
2
370 - Education
2
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
600 - Technology
1
780 - Music
1