Classification
370 - Education
330 - Economics
5
320 - Political science
4
100 - Philosophy & psychology
2
333 - Economics of land & energy
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
170 - Ethics
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
400 - Language
1
600 - Technology
1
720 - Architecture
1
900 - History & geography
1