Classification
304 - Factors affecting social behavior
330 - Economics
5
610 - Medicine & health
4
320 - Political science
3
336 - Public finance
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
900 - History & geography
1