Classification
363 - Other social problems & services
20
320 - Political science
9
140 - Specific philosophical schools
6
330 - Economics
6
700 - The arts; fine & decorative arts
6
581 - Specific topics in natural history
5
100 - Philosophy & psychology
4
200 - Religion
3
333 - Economics of land & energy
3
900 - History & geography
3
720 - Architecture
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
300 - Social sciences
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1