Classification
320 - Political science
26
370 - Education
26
333 - Economics of land & energy
9
300 - Social sciences
7
100 - Philosophy & psychology
5
363 - Other social problems & services
3
600 - Technology
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
330 - Economics
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
780 - Music
1
900 - History & geography
1