Klassifikationsnummer
- H - Social Science 1,289 results
- Q - Science 379 results
- B - Philosophy, Psychology, Religion 278 results
- L - Education 266 results
- P - Language and Literature 192 results
- Z - Library Science 126 results
- G - Geography, Anthropology, Recreation 122 results
- T - Technology 62 results
- N - Fine Arts 42 results
- J - Political Science 39 results
- C - Historical Sciences 25 results
- D - World History 24 results
- K - Law 17 results
- A - General Works 5 results
- S - Agriculture 5 results
- R - Medicine 3 results
- F - General American History 1 results
- M - Music 1 results
- V - Naval Science 1 results