Classification
330 - Economics
23
610 - Medicine & health
13
320 - Political science
6
333 - Economics of land & energy
5
570 - Life sciences; biology
5
700 - The arts; fine & decorative arts
4
304 - Factors affecting social behavior
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
363 - Other social problems & services
2
100 - Philosophy & psychology
1
361 - Social problems & social welfare in general
1
370 - Education
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
900 - History & geography
1