Número de Clasificación
- H - Social Science 27 results
- K - Law 26 results
- Q - Science 18 results
- T - Technology 11 results
- S - Agriculture 10 results
- D - World History 7 results
- L - Education 7 results
- F - General American History 6 results
- J - Political Science 6 results
- G - Geography, Anthropology, Recreation 4 results
- N - Fine Arts 4 results
- R - Medicine 3 results
- A - General Works 1 results
- B - Philosophy, Psychology, Religion 1 results
- M - Music 1 results
- V - Naval Science 1 results
- Z - Library Science 1 results