Classification
333 - Economics of land & energy
5
580 - Plants (Botany)
610 - Medicine & health
000 - Computer science, information & general works
4
140 - Specific philosophical schools
3
700 - The arts; fine & decorative arts
3
363 - Other social problems & services
2
370 - Education
2
615 - Pharmacology & therapeutics
2
304 - Factors affecting social behavior
1
551 - Geology, hydrology & meteorology
1