Classification
320 - Political science
330 - Economics
610 - Medicine & health
658 - General management
333 - Economics of land & energy
7
363 - Other social problems & services
4
551 - Geology, hydrology & meteorology
4
600 - Technology
4
000 - Computer science, information & general works
3
380 - Commerce, communications & transportation
3
700 - The arts; fine & decorative arts
3
304 - Factors affecting social behavior
2
370 - Education
2
576 - Genetics & evolution
2
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
657 - Accounting
1
900 - History & geography
1