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Medium
- oral histories (literary works)12
- instructional materials9
- letters (correspondence)9
- photographs8
- black-and-white photographs7
- case files7
- sound recordings7
- timelines (chronologies)6
- articles5
- teaching guides4
- judicial records3
- memorandums3
- online exhibitions3
- transcripts3
- documentaries and factual works2
- legislative records2
- lesson plans2
- maps2
- maps (documents)2
- annotated bibliographies1