Classification
361 - Social problems & social welfare in general
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
600 - Technology
1
610 - Medicine & health
1
612 - Human physiology
1
658 - General management
1
900 - History & geography
1