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