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Medium
- photographs[remove]13
- instructional materials6
- articles5
- sound recordings5
- timelines (chronologies)5
- letters (correspondence)4
- teaching guides4
- black-and-white photographs3
- documentaries and factual works2
- legislative records2
- maps2
- maps (documents)2
- online exhibitions2
- transcripts2
- annotated bibliographies1
- correspondence1
- interviews1
- learning modules1
- lesson plans1
- newsletters1