Número de Clasificación
- P - Language and Literature 428 results
- H - Social Science 175 results
- T - Technology 25 results
- K - Law 18 results
- G - Geography, Anthropology, Recreation 10 results
- D - World History 7 results
- L - Education 6 results
- M - Music 6 results
- S - Agriculture 4 results
- E - United States History 3 results
- F - General American History 3 results
- J - Political Science 3 results
- B - Philosophy, Psychology, Religion 2 results
- Q - Science 2 results
- A - General Works 1 results
- C - Historical Sciences 1 results
- N - Fine Arts 1 results
- Z - Library Science 1 results