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Subject (Genre)
- Biography2,087
- Congresses928
- History896
- Periodicals853
- Sources557
- Interviews453
- Nonfiction films411
- Cases373
- Internet videos372
- Electronic books344
- Documentary films245
- Biographies193
- Case studies186
- Educational films174
- Early works to 1800172
- Trials, litigation, etc169
- Data sets163
- Unedited footage154
- Oral histories125
- Nonfiction television programs123