Classification
100 - Philosophy & psychology
340 - Law
361 - Social problems & social welfare in general
320 - Political science
4
140 - Specific philosophical schools
2
330 - Economics
2
900 - History & geography
2
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1