Classification
320 - Political science
900 - History & geography
20
340 - Law
16
300 - Social sciences
6
100 - Philosophy & psychology
5
140 - Specific philosophical schools
5
700 - The arts; fine & decorative arts
3
330 - Economics
2
361 - Social problems & social welfare in general
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
364 - Criminology
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
600 - Technology
1
800 - Literature & rhetoric
1