Classification
333 - Economics of land & energy
320 - Political science
1,292
330 - Economics
815
363 - Other social problems & services
548
304 - Factors affecting social behavior
317
610 - Medicine & health
317
380 - Commerce, communications & transportation
179
630 - Agriculture & related technologies
120
600 - Technology
117
370 - Education
102
336 - Public finance
83
340 - Law
4