Classification
301 - Sociology & anthropology
300 - Social sciences
5
610 - Medicine & health
4
900 - History & geography
4
100 - Philosophy & psychology
3
320 - Political science
3
333 - Economics of land & energy
3
140 - Specific philosophical schools
2
600 - Technology
2
200 - Religion
1
330 - Economics
1
340 - Law
1
363 - Other social problems & services
1
364 - Criminology
1
370 - Education
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1