Número de Clasificación
- H - Social Science 83,767 results
- B - Philosophy, Psychology, Religion 64,438 results
- P - Language and Literature 56,940 results
- Q - Science 38,061 results
- R - Medicine 28,414 results
- T - Technology 25,379 results
- D - World History 22,007 results
- L - Education 15,693 results
- J - Political Science 13,246 results
- K - Law 12,425 results
- G - Geography, Anthropology, Recreation 12,384 results
- E - United States History 9,599 results
- F - General American History 6,346 results
- M - Music 5,471 results
- N - Fine Arts 5,155 results
- S - Agriculture 3,628 results
- Z - Library Science 3,320 results
- U - Military Science 2,388 results
- C - Historical Sciences 2,223 results
- A - General Works 586 results
- V - Naval Science 433 results