Classification
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
363 - Other social problems & services
3
320 - Political science
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
330 - Economics
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
370 - Education
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
657 - Accounting
1