Número de Clasificación
- H - Social Science 99 results
- L - Education 60 results
- J - Political Science 28 results
- G - Geography, Anthropology, Recreation 26 results
- B - Philosophy, Psychology, Religion 8 results
- R - Medicine 8 results
- P - Language and Literature 5 results
- T - Technology 3 results
- D - World History 2 results
- K - Law 2 results
- Q - Science 2 results
- A - General Works 1 results
- C - Historical Sciences 1 results
- N - Fine Arts 1 results
- S - Agriculture 1 results
- Z - Library Science 1 results