Classification
320 - Political science
333 - Economics of land & energy
5
363 - Other social problems & services
600 - Technology
5
620 - Engineering & allied operations
330 - Economics
4
630 - Agriculture & related technologies
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
100 - Philosophy & psychology
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
900 - History & geography
2
370 - Education
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
657 - Accounting
1