Classification
170 - Ethics
200 - Religion
320 - Political science
100 - Philosophy & psychology
5
140 - Specific philosophical schools
4
340 - Law
4
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
400 - Language
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
800 - Literature & rhetoric
1
900 - History & geography
1