Classification
363 - Other social problems & services
620 - Engineering & allied operations
600 - Technology
7
551 - Geology, hydrology & meteorology
3
140 - Specific philosophical schools
2
320 - Political science
2
333 - Economics of land & energy
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
330 - Economics
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1