Classification
100 - Philosophy & psychology
340 - Law
363 - Other social problems & services
170 - Ethics
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
320 - Political science
3
333 - Economics of land & energy
3
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
200 - Religion
1
330 - Economics
1
370 - Education
1
400 - Language
1
610 - Medicine & health
1
780 - Music
1
900 - History & geography
1