Classification
610 - Medicine & health
320 - Political science
76
330 - Economics
75
340 - Law
6
900 - History & geography
6
370 - Education
3
140 - Specific philosophical schools
2
100 - Philosophy & psychology
1
300 - Social sciences
1
306 - Culture & institutions
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
630 - Agriculture & related technologies
1