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Medium
- articles5
- bibliographies3
- biographies1
- black-and-white photographs10
- documentaries and factual works[remove]28
- instructional materials17
- interviews2
- letters (correspondence)4
- maps2
- news2
- oral histories (literary works)2
- photographs7
- slide shows2
- slideshows1
- sound recordings16
- study guides10
- texts (document genres)15
- timelines (chronologies)10
- transcripts9
- unedited footage1