Classification
330 - Economics
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
000 - Computer science, information & general works
2
340 - Law
2
580 - Plants (Botany)
2
320 - Political science
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
530 - Physics
1
600 - Technology
1
630 - Agriculture & related technologies
1
658 - General management
1