Classification
363 - Other social problems & services
610 - Medicine & health
12
333 - Economics of land & energy
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
6
600 - Technology
6
140 - Specific philosophical schools
3
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
615 - Pharmacology & therapeutics
2
320 - Political science
1
330 - Economics
1
370 - Education
1
530 - Physics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
628 - Sanitary & municipal engineering
1
630 - Agriculture & related technologies
1
900 - History & geography
1