Número de Clasificación
- H - Social Science 128 results
- T - Technology 83 results
- G - Geography, Anthropology, Recreation 63 results
- L - Education 49 results
- P - Language and Literature 47 results
- Q - Science 42 results
- B - Philosophy, Psychology, Religion 36 results
- R - Medicine 34 results
- D - World History 26 results
- J - Political Science 22 results
- K - Law 16 results
- N - Fine Arts 9 results
- M - Music 5 results
- S - Agriculture 4 results
- E - United States History 3 results
- U - Military Science 3 results
- Z - Library Science 3 results
- C - Historical Sciences 2 results
- A - General Works 1 results