Classification
100 - Philosophy & psychology
9
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
160 - Logic
1
170 - Ethics
1
300 - Social sciences
23
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
6
320 - Political science
12
330 - Economics
4
333 - Economics of land & energy
1
340 - Law
4
361 - Social problems & social welfare in general
2
363 - Other social problems & services
1
370 - Education
530 - Physics
1
600 - Technology
2
700 - The arts; fine & decorative arts
5
900 - History & geography
1