Número de Clasificación
- E - United States History 20 results
- H - Social Science 17 results
- K - Law 17 results
- P - Language and Literature 9 results
- G - Geography, Anthropology, Recreation 8 results
- J - Political Science 8 results
- S - Agriculture 8 results
- F - General American History 7 results
- D - World History 5 results
- L - Education 5 results
- B - Philosophy, Psychology, Religion 2 results
- Q - Science 2 results
- U - Military Science 2 results
- N - Fine Arts 1 results
- R - Medicine 1 results
- Z - Library Science 1 results