Classification
140 - Specific philosophical schools
2
170 - Ethics
330 - Economics
340 - Law
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1