Classification
580 - Plants (Botany)
4
000 - Computer science, information & general works
3
330 - Economics
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
320 - Political science
1
333 - Economics of land & energy
1
340 - Law
1
600 - Technology
1
630 - Agriculture & related technologies
1