Classification
576 - Genetics & evolution
610 - Medicine & health
4
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
580 - Plants (Botany)
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
600 - Technology
1
612 - Human physiology
1
620 - Engineering & allied operations
1