Classification
363 - Other social problems & services
600 - Technology
2
800 - Literature & rhetoric
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
330 - Economics
1
333 - Economics of land & energy
1
370 - Education
1
400 - Language
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1