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Medium
- transcripts16
- oral histories (literary works)14
- sound recordings13
- black-and-white photographs5
- federal government records5
- letters (correspondence)5
- articles3
- documents3
- instructional materials3
- documentaries and factual works2
- photographs2
- speeches2
- timelines (chronologies)2
- advertisements1
- audiovisual materials1
- collection1
- film1
- interviews1
- memorandums1
- moving images1