Classification
140 - Specific philosophical schools
361 - Social problems & social welfare in general
320 - Political science
5
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
100 - Philosophy & psychology
3
170 - Ethics
3
300 - Social sciences
3
330 - Economics
3
333 - Economics of land & energy
3
340 - Law
3
600 - Technology
3
900 - History & geography
3
200 - Religion
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
658 - General management
1