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Medium
- instructional materials[remove]5
- articles3
- black-and-white photographs3
- sound recordings3
- documentaries and factual works2
- photographs2
- annotated bibliographies1
- biographies1
- legislative records1
- lesson plans1
- letters (correspondence)1
- maps1
- oral histories (literary works)1
- slide shows1
- slideshows1
- teaching guides1
- timelines (chronologies)1