Classification
320 - Political science
333 - Economics of land & energy
1,292
330 - Economics
1,114
363 - Other social problems & services
353
304 - Factors affecting social behavior
292
610 - Medicine & health
292
600 - Technology
252
380 - Commerce, communications & transportation
153
370 - Education
149
336 - Public finance
93
630 - Agriculture & related technologies
78
340 - Law
1