Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
333 - Economics of land & energy
4
580 - Plants (Botany)
4
600 - Technology
4
620 - Engineering & allied operations
3
900 - History & geography
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
330 - Economics
2
540 - Chemistry & allied sciences
2
363 - Other social problems & services
1
615 - Pharmacology & therapeutics
1