Klassifikationsnummer
- D - World History 334 results
- P - Language and Literature 159 results
- B - Philosophy, Psychology, Religion 91 results
- H - Social Science 41 results
- N - Fine Arts 39 results
- J - Political Science 23 results
- A - General Works 20 results
- L - Education 10 results
- Q - Science 9 results
- G - Geography, Anthropology, Recreation 7 results
- C - Historical Sciences 5 results
- U - Military Science 3 results
- K - Law 2 results
- S - Agriculture 2 results
- T - Technology 2 results
- Z - Library Science 2 results