Klassifikationsnummer
- H - Social Science 85 results
- J - Political Science 68 results
- E - United States History 30 results
- L - Education 26 results
- P - Language and Literature 19 results
- D - World History 15 results
- B - Philosophy, Psychology, Religion 12 results
- G - Geography, Anthropology, Recreation 11 results
- K - Law 8 results
- F - General American History 7 results
- N - Fine Arts 3 results
- R - Medicine 2 results
- A - General Works 1 results
- Q - Science 1 results