Classification
320 - Political science
900 - History & geography
15
340 - Law
12
300 - Social sciences
4
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
700 - The arts; fine & decorative arts
2
304 - Factors affecting social behavior
1
330 - Economics
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
600 - Technology
1