Classification
320 - Political science
330 - Economics
11
630 - Agriculture & related technologies
6
300 - Social sciences
3
333 - Economics of land & energy
3
363 - Other social problems & services
2
000 - Computer science, information & general works
1
340 - Law
1
361 - Social problems & social welfare in general
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1