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Medium
- instructional materials4
- sound recordings4
- black-and-white photographs3
- documentaries and factual works3
- articles2
- interviews2
- online exhibitions2
- oral histories (literary works)2
- photographs2
- timelines (chronologies)2
- web sites2
- biographies1
- collection1
- letters (correspondence)1
- motion pictures (visual works)1
- pamphlets1
- reports1
- slide shows1
- slideshows1
- study guides1