Número de Clasificación
- H - Social Science 172 results
- D - World History 51 results
- P - Language and Literature 30 results
- B - Philosophy, Psychology, Religion 14 results
- K - Law 8 results
- R - Medicine 6 results
- G - Geography, Anthropology, Recreation 4 results
- J - Political Science 3 results
- L - Education 3 results
- N - Fine Arts 3 results
- A - General Works 2 results
- T - Technology 2 results
- M - Music 1 results
- Q - Science 1 results
- S - Agriculture 1 results
- U - Military Science 1 results
- Z - Library Science 1 results