Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
1
320 - Political science
1
330 - Economics
333 - Economics of land & energy
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric