Classification
320 - Political science
610 - Medicine & health
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
330 - Economics
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
170 - Ethics
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
340 - Law
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
800 - Literature & rhetoric
1