Classification
304 - Factors affecting social behavior
320 - Political science
363 - Other social problems & services
610 - Medicine & health
10
330 - Economics
8
333 - Economics of land & energy
6
630 - Agriculture & related technologies
6
000 - Computer science, information & general works
4
581 - Specific topics in natural history
4
700 - The arts; fine & decorative arts
4
600 - Technology
3
140 - Specific philosophical schools
2
300 - Social sciences
2
370 - Education
2
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1
900 - History & geography
1