Classification
140 - Specific philosophical schools
581 - Specific topics in natural history
700 - The arts; fine & decorative arts
320 - Political science
5
333 - Economics of land & energy
5
000 - Computer science, information & general works
4
363 - Other social problems & services
4
610 - Medicine & health
4
330 - Economics
3
200 - Religion
2
304 - Factors affecting social behavior
2
630 - Agriculture & related technologies
2
900 - History & geography
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
340 - Law
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
658 - General management
1