Classification
630 - Agriculture & related technologies
330 - Economics
19
320 - Political science
18
900 - History & geography
3
100 - Philosophy & psychology
2
370 - Education
2
000 - Computer science, information & general works
1
300 - Social sciences
1
333 - Economics of land & energy
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1