Classification
100 - Philosophy & psychology
170 - Ethics
320 - Political science
330 - Economics
300 - Social sciences
5
140 - Specific philosophical schools
3
610 - Medicine & health
3
333 - Economics of land & energy
2
340 - Law
2
600 - Technology
2
900 - History & geography
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
370 - Education
1
620 - Engineering & allied operations
1