Klassifikationsnummer
- H - Social Science 35 results
- J - Political Science 16 results
- P - Language and Literature 11 results
- B - Philosophy, Psychology, Religion 7 results
- D - World History 7 results
- F - General American History 3 results
- G - Geography, Anthropology, Recreation 3 results
- L - Education 3 results
- C - Historical Sciences 2 results
- Q - Science 2 results
- R - Medicine 2 results
- T - Technology 2 results