Número de Clasificación
- H - Social Science 436 results
- D - World History 95 results
- G - Geography, Anthropology, Recreation 56 results
- P - Language and Literature 36 results
- J - Political Science 26 results
- B - Philosophy, Psychology, Religion 16 results
- L - Education 16 results
- E - United States History 12 results
- C - Historical Sciences 10 results
- F - General American History 7 results
- Q - Science 7 results
- K - Law 6 results
- R - Medicine 5 results
- T - Technology 4 results
- M - Music 1 results
- S - Agriculture 1 results
- V - Naval Science 1 results