Classification
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
576 - Genetics & evolution
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1