Classification
330 - Economics
11
320 - Political science
8
333 - Economics of land & energy
5
630 - Agriculture & related technologies
5
600 - Technology
4
620 - Engineering & allied operations
3
363 - Other social problems & services
2
000 - Computer science, information & general works
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
657 - Accounting
1