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Subject (Genre)
- Documentary films5
- Legislative hearings4
- Environmental impact statements3
- Environmental films2
- Nonfiction films2
- Periodicals2
- Bibliography1
- Congresses1
- Documentary1
- Documentary Television series1
- Documentary television programs1
- Educational films1
- Historical television programs1
- Internet videos1
- Nonfiction television programs1
- Television programs1
- Television series1
- Video recordings for the hearing impaired1