Classification
100 - Philosophy & psychology
170 - Ethics
330 - Economics
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
300 - Social sciences
1
340 - Law
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
658 - General management
1
900 - History & geography
1