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Subject (Genre)
- Congresses230
- Handbooks, manuals, etc88
- Periodicals81
- Legislative Report - Public Bills69
- Statistics44
- Documentary films27
- Annual Reports26
- Executive Department Publications25
- Bibliography24
- Electronic books19
- Nonfiction films15
- Specifications15
- Legislative Report - Private Bills12
- Periodical11
- Documentary television programs9
- Legislative hearings8
- Monographs8
- Case studies7
- Environmental films7
- Indexes7