Classification
300 - Social sciences
320 - Political science
900 - History & geography
11
943 - Central Europe; Germany
6
330 - Economics
5
700 - The arts; fine & decorative arts
3
338 - Production
2
382 - International commerce
2
630 - Agriculture & related technologies
2
160 - Logic
1
305 - Social groups
1
321 - Systems of governments & states
1
327 - International relations
1
339 - Macroeconomics & related topics
1
576 - Genetics & evolution
1