Classification
100 - Philosophy & psychology
170 - Ethics
200 - Religion
370 - Education
140 - Specific philosophical schools
3
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
300 - Social sciences
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
800 - Literature & rhetoric
1