Classification
300 - Social sciences
900 - History & geography
43
320 - Political science
35
330 - Economics
16
943 - Central Europe; Germany
7
700 - The arts; fine & decorative arts
6
338 - Production
5
305 - Social groups
3
327 - International relations
3
170 - Ethics
2
200 - Religion
2
321 - Systems of governments & states
2
331 - Labor economics
2
340 - Law
2
382 - International commerce
2
630 - Agriculture & related technologies
2
949 - Other parts of Europe
2
160 - Logic
1
174 - Occupational ethics
1
241 - Christian ethics
1
271 - Religious orders in church history
1
306 - Culture & institutions
1
322 - Relation of state to organized groups
1
339 - Macroeconomics & related topics
1
341 - Law of nations
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1
809 - History, description & criticism
1
940 - History of Europe
1