Classification
100 - Philosophy & psychology
361 - Social problems & social welfare in general
900 - History & geography
320 - Political science
3
340 - Law
3
140 - Specific philosophical schools
2
170 - Ethics
2
610 - Medicine & health
2
300 - Social sciences
1
330 - Economics
1
333 - Economics of land & energy
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
370 - Education
1
500 - Natural sciences & mathematics
1