Classification
330 - Economics
222
320 - Political science
192
333 - Economics of land & energy
178
304 - Factors affecting social behavior
92
610 - Medicine & health
92
370 - Education
70
363 - Other social problems & services
52
600 - Technology
44
336 - Public finance
37
380 - Commerce, communications & transportation
32
630 - Agriculture & related technologies
27
340 - Law
2