Classification
000 - Computer science, information & general works
600 - Technology
4
658 - General management
900 - History & geography
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
330 - Economics
2
333 - Economics of land & energy
1
363 - Other social problems & services
1
580 - Plants (Botany)
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1