Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
2
170 - Ethics
300 - Social sciences
4
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
320 - Political science
7
330 - Economics
333 - Economics of land & energy
1
340 - Law
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
600 - Technology
1
700 - The arts; fine & decorative arts
1
900 - History & geography
2