Classification
300 - Social sciences
4
330 - Economics
3
360 - Social problems & services; associations
3
361 - Social problems & social welfare in general
3
364 - Criminology
3
333 - Economics of land & energy
2
370 - Education
2
000 - Computer science, information & general works
1
200 - Religion
1
320 - Political science
1
336 - Public finance
1
720 - Architecture
1
900 - History & geography
1