Classification
320 - Political science
72
900 - History & geography
35
330 - Economics
33
340 - Law
28
700 - The arts; fine & decorative arts
14
300 - Social sciences
9
333 - Economics of land & energy
8
304 - Factors affecting social behavior
6
200 - Religion
4
400 - Language
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
170 - Ethics
1
274 - History of Christianity in Europe
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
600 - Technology
1
610 - Medicine & health
1