Classification
610 - Medicine & health
7
363 - Other social problems & services
6
000 - Computer science, information & general works
4
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
581 - Specific topics in natural history
3
900 - History & geography
3
304 - Factors affecting social behavior
2
600 - Technology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
330 - Economics
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
658 - General management
1