Classification
320 - Political science
42
330 - Economics
37
333 - Economics of land & energy
31
304 - Factors affecting social behavior
18
610 - Medicine & health
18
370 - Education
14
600 - Technology
13
363 - Other social problems & services
9
336 - Public finance
4
630 - Agriculture & related technologies
4
380 - Commerce, communications & transportation
1