Classification
304 - Factors affecting social behavior
330 - Economics
363 - Other social problems & services
610 - Medicine & health
9
370 - Education
6
630 - Agriculture & related technologies
5
320 - Political science
3
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
581 - Specific topics in natural history
1
600 - Technology
1