Número de Clasificación
- D - World History 77 results
- P - Language and Literature 42 results
- H - Social Science 31 results
- B - Philosophy, Psychology, Religion 29 results
- Q - Science 20 results
- E - United States History 19 results
- C - Historical Sciences 10 results
- M - Music 10 results
- F - General American History 8 results
- G - Geography, Anthropology, Recreation 8 results
- L - Education 7 results
- T - Technology 7 results
- N - Fine Arts 6 results
- R - Medicine 6 results
- K - Law 3 results
- S - Agriculture 3 results
- J - Political Science 1 results