Klassifikationsnummer
- D - World History 12 results
- N - Fine Arts 7 results
- B - Philosophy, Psychology, Religion 6 results
- H - Social Science 4 results
- P - Language and Literature 4 results
- C - Historical Sciences 3 results
- Q - Science 2 results
- G - Geography, Anthropology, Recreation 1 results
- J - Political Science 1 results
- M - Music 1 results