Classification
330 - Economics
363 - Other social problems & services
320 - Political science
6
333 - Economics of land & energy
5
610 - Medicine & health
5
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
580 - Plants (Botany)
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
370 - Education
2
600 - Technology
2
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1