Classification
140 - Specific philosophical schools
330 - Economics
3
000 - Computer science, information & general works
2
304 - Factors affecting social behavior
2
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1