Classification
610 - Medicine & health
6
000 - Computer science, information & general works
5
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1