Klassifikationsnummer
- P - Language and Literature 56 results
- D - World History 27 results
- H - Social Science 9 results
- J - Political Science 4 results
- B - Philosophy, Psychology, Religion 3 results
- G - Geography, Anthropology, Recreation 3 results
- K - Law 2 results
- L - Education 2 results
- M - Music 2 results
- Z - Library Science 2 results
- N - Fine Arts 1 results
- S - Agriculture 1 results