Classification
363 - Other social problems & services
610 - Medicine & health
304 - Factors affecting social behavior
4
330 - Economics
4
000 - Computer science, information & general works
3
320 - Political science
3
370 - Education
3
551 - Geology, hydrology & meteorology
3
333 - Economics of land & energy
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
400 - Language
1
576 - Genetics & evolution
1
600 - Technology
1
620 - Engineering & allied operations
1
900 - History & geography
1