Classification
304 - Factors affecting social behavior
330 - Economics
610 - Medicine & health
320 - Political science
38
333 - Economics of land & energy
33
370 - Education
22
363 - Other social problems & services
10
140 - Specific philosophical schools
5
600 - Technology
5
380 - Commerce, communications & transportation
4
630 - Agriculture & related technologies
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
581 - Specific topics in natural history
2
336 - Public finance
1
340 - Law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1