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Subject (Genre)
- Handbooks, manuals, etc23
- Congresses19
- Observations15
- Legislative hearings10
- Early works to 18008
- Observers' manuals5
- History4
- Periodicals4
- Charts, diagrams, etc3
- Electronic books3
- Tracts (literary works)2
- Action and adventure films1
- Adventure1
- Adventure Feature1
- Adventure films1
- Atlases1
- Broadsides1
- Conference papers and proceedings1
- Documentary films1
- Drama1