Classification
140 - Specific philosophical schools
330 - Economics
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
580 - Plants (Botany)
2
370 - Education
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1