Classification
170 - Ethics
301 - Sociology & anthropology
330 - Economics
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
100 - Philosophy & psychology
2
300 - Social sciences
2
340 - Law
2
370 - Education
2
900 - History & geography
2
200 - Religion
1
304 - Factors affecting social behavior
1
320 - Political science
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1