Número de Clasificación
- D - World History 631 results
- P - Language and Literature 449 results
- G - Geography, Anthropology, Recreation 109 results
- B - Philosophy, Psychology, Religion 97 results
- T - Technology 82 results
- L - Education 66 results
- H - Social Science 62 results
- N - Fine Arts 60 results
- K - Law 45 results
- R - Medicine 41 results
- C - Historical Sciences 28 results
- M - Music 27 results
- S - Agriculture 24 results
- Q - Science 16 results
- F - General American History 11 results
- Z - Library Science 11 results
- J - Political Science 10 results
- E - United States History 2 results
- A - General Works 1 results
- U - Military Science 1 results