Classification
900 - History & geography
5
320 - Political science
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
330 - Economics
1
363 - Other social problems & services
1
400 - Language
1
576 - Genetics & evolution
1
770 - Photography, photographs & computer art
1
780 - Music
1
800 - Literature & rhetoric
1
946 - Iberian Peninsula & adjacent islands
1