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Subject (Genre)
- Congresses81
- Environmental impact statements49
- Legislative hearings27
- Educational films23
- Internet videos23
- Documentary films15
- Periodicals15
- Nonfiction films9
- History8
- Electronic books7
- Documentary television programs6
- Tox report6
- Abstracts4
- Handbooks, manuals, etc4
- Annotations (Provenance)3
- Bibliography3
- Biography3
- Feature films3
- Nonfiction television programs3
- Rules and practice3