Classification
100 - Philosophy & psychology
7
200 - Religion
610 - Medicine & health
320 - Political science
3
900 - History & geography
3
300 - Social sciences
2
333 - Economics of land & energy
2
361 - Social problems & social welfare in general
2
000 - Computer science, information & general works
1
170 - Ethics
1
301 - Sociology & anthropology
1