Classification
000 - Computer science, information & general works
1
320 - Political science
330 - Economics
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1