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