Classification
320 - Political science
333 - Economics of land & energy
7
658 - General management
330 - Economics
5
551 - Geology, hydrology & meteorology
5
610 - Medicine & health
5
000 - Computer science, information & general works
4
363 - Other social problems & services
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
370 - Education
1
380 - Commerce, communications & transportation
1
550 - Earth sciences
1
620 - Engineering & allied operations
1
900 - History & geography
1