Classification
100 - Philosophy & psychology
361 - Social problems & social welfare in general
900 - History & geography
140 - Specific philosophical schools
2
170 - Ethics
2
320 - Political science
2
340 - Law
2
610 - Medicine & health
2
300 - Social sciences
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