Classification
000 - Computer science, information & general works
4
140 - Specific philosophical schools
330 - Economics
4
610 - Medicine & health
630 - Agriculture & related technologies
333 - Economics of land & energy
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
581 - Specific topics in natural history
2
304 - Factors affecting social behavior
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
658 - General management
1