Classification
610 - Medicine & health
28
612 - Human physiology
9
330 - Economics
4
613 - Personal health & safety
4
320 - Political science
3
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
900 - History & geography
2
000 - Computer science, information & general works
1
300 - Social sciences
1
540 - Chemistry & allied sciences
1
570 - Life sciences; biology
1
580 - Plants (Botany)
1
616 - Diseases
1
628 - Sanitary & municipal engineering
1
930 - History of ancient world to ca. 499
1