Classification
100 - Philosophy & psychology
2
140 - Specific philosophical schools
170 - Ethics
300 - Social sciences
301 - Sociology & anthropology
320 - Political science
200 - Religion
1
304 - Factors affecting social behavior
1
330 - Economics
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
581 - Specific topics in natural history
1
600 - Technology
1
900 - History & geography
1