Classification
340 - Law
320 - Political science
8
330 - Economics
7
900 - History & geography
3
300 - Social sciences
2
333 - Economics of land & energy
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
2
200 - Religion
1
301 - Sociology & anthropology
1
363 - Other social problems & services
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1