Classification
330 - Economics
28
333 - Economics of land & energy
17
320 - Political science
16
304 - Factors affecting social behavior
11
610 - Medicine & health
11
370 - Education
10
820 - English & Old English literatures
10
600 - Technology
8
336 - Public finance
6
363 - Other social problems & services
3
300 - Social sciences
2
327 - International relations
2
362 - Social welfare problems & services
2
900 - History & geography
2
301 - Sociology & anthropology
1
305 - Social groups
1
338 - Production
1
340 - Law
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
630 - Agriculture & related technologies
1
940 - History of Europe
1
972 - Middle America; Mexico
1