Subject (Genre)
- Popular works162
- Formulae121
- Case studies116
- Early works to 1900112
- Problems and exercises106
- Online media101
- Early works97
- Periodical83
- Miscellanea80
- Catalogs66
- Nonfiction television programs61
- Nonfiction films57
- Annotations (Provenance)56
- Handbooks and manuals52
- Fiction50
- Directories45
- Observations44
- Study guides44
- Indexes42
- Film excerpts40