Classification
340 - Law
320 - Political science
64
330 - Economics
61
900 - History & geography
24
300 - Social sciences
10
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
100 - Philosophy & psychology
6
380 - Commerce, communications & transportation
6
140 - Specific philosophical schools
5
630 - Agriculture & related technologies
5
000 - Computer science, information & general works
3
370 - Education
3
551 - Geology, hydrology & meteorology
3
120 - Epistemology, causation & humankind
2
170 - Ethics
2
304 - Factors affecting social behavior
2
363 - Other social problems & services
2
576 - Genetics & evolution
2
600 - Technology
2
610 - Medicine & health
2
301 - Sociology & anthropology
1
400 - Language
1
500 - Natural sciences & mathematics
1
530 - Physics
1
581 - Specific topics in natural history
1