Classification
333 - Economics of land & energy
320 - Political science
30
363 - Other social problems & services
11
610 - Medicine & health
10
330 - Economics
7
370 - Education
4
140 - Specific philosophical schools
3
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
700 - The arts; fine & decorative arts
3
304 - Factors affecting social behavior
2
900 - History & geography
2
380 - Commerce, communications & transportation
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
720 - Architecture
1