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Medium
- documentaries and factual works[remove]11
- sound recordings10
- black-and-white photographs7
- instructional materials7
- transcripts6
- photographs5
- texts (document genres)4
- articles3
- timelines (chronologies)3
- letters (correspondence)2
- oral histories (literary works)2
- slide shows2
- study guides2
- web sites2
- bibliographies1
- biographies1
- interviews1
- slideshows1