Klassifikationsnummer
- H - Social Science 76 results
- P - Language and Literature 35 results
- L - Education 5 results
- B - Philosophy, Psychology, Religion 4 results
- T - Technology 3 results
- D - World History 2 results
- E - United States History 2 results
- G - Geography, Anthropology, Recreation 1 results
- J - Political Science 1 results
- R - Medicine 1 results