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Subject (Genre)
- Periodicals99
- Congresses53
- Biography22
- History18
- Treaties and Conventions14
- Electronic books13
- Case studies11
- Executive Department Publications10
- Annual Reports8
- Catalogs8
- Criticism, interpretation, etc8
- Bibliography7
- Sources7
- Pictorial works6
- Educational films5
- Internet videos5
- Presidential Communications and Messages5
- Conference papers and proceedings3
- Documentary films3
- Exhibitions3