Classification
330 - Economics
719
320 - Political science
690
336 - Public finance
204
900 - History & geography
193
300 - Social sciences
131
340 - Law
124
576 - Genetics & evolution
63
333 - Economics of land & energy
14
363 - Other social problems & services
12
630 - Agriculture & related technologies
9
304 - Factors affecting social behavior
8
610 - Medicine & health
8
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
6
600 - Technology
4
200 - Religion
3
370 - Education
2
100 - Philosophy & psychology
1
160 - Logic
1
170 - Ethics
1
338 - Production
1
658 - General management
1
670 - Manufacturing
1
680 - Manufacture for specific uses
1