Classification
320 - Political science
590
330 - Economics
588
300 - Social sciences
111
340 - Law
74
630 - Agriculture & related technologies
43
900 - History & geography
24
370 - Education
8
304 - Factors affecting social behavior
5
610 - Medicine & health
5
333 - Economics of land & energy
3
600 - Technology
3
363 - Other social problems & services
2
170 - Ethics
1
305 - Social groups
1
379 - Public policy issues in education
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
700 - The arts; fine & decorative arts
1
948 - Scandinavia
1