Classification
000 - Computer science, information & general works
330 - Economics
333 - Economics of land & energy
3
600 - Technology
3
620 - Engineering & allied operations
363 - Other social problems & services
2
630 - Agriculture & related technologies
2
658 - General management
2
320 - Political science
1
336 - Public finance
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
700 - The arts; fine & decorative arts
1