Classification
140 - Specific philosophical schools
301 - Sociology & anthropology
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
900 - History & geography
2
000 - Computer science, information & general works
1
330 - Economics
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
658 - General management
1