Classification
170 - Ethics
300 - Social sciences
320 - Political science
330 - Economics
100 - Philosophy & psychology
6
140 - Specific philosophical schools
3
340 - Law
2
900 - History & geography
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
370 - Education
1
600 - Technology
1
610 - Medicine & health
1