Classification
333 - Economics of land & energy
2
581 - Specific topics in natural history
610 - Medicine & health
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
530 - Physics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1