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Subject (Genre)
- Biography48
- History30
- Sources23
- Congresses18
- Electronic books12
- Periodicals8
- Documentary films6
- Nonfiction films6
- Pictorial works6
- Streaming videos6
- Diaries5
- Bibliography3
- Case studies3
- Data sets3
- Encyclopedias3
- Records and correspondence3
- Text corpora3
- Caricatures and cartoons2
- Chinese language materials2
- Directories2