Classification
304 - Factors affecting social behavior
123
320 - Political science
1,105
330 - Economics
407
333 - Economics of land & energy
1,105
336 - Public finance
20
363 - Other social problems & services
176
370 - Education
67
380 - Commerce, communications & transportation
65
600 - Technology
43
610 - Medicine & health
123
630 - Agriculture & related technologies
53