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Subject (Genre)
- Congresses1,050
- Case studies316
- Periodicals294
- Electronic books191
- Conference papers and proceedings68
- Documentary films66
- Legislative hearings47
- Nonfiction films42
- Documentary television programs37
- Statistics34
- Handbooks, manuals, etc29
- Educational films27
- History26
- Interviews25
- Internet videos24
- Feature films17
- Bibliography15
- Conference proceedings15
- Directories14
- Biography13