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Medium
- instructional materials8
- photographs7
- black-and-white photographs4
- sound recordings4
- articles3
- documentaries and factual works3
- letters (correspondence)3
- maps3
- timelines (chronologies)3
- legislative records2
- lesson plans2
- pamphlets2
- posters2
- teaching guides2
- texts (document genres)2
- books1
- broadsides1
- broadsides (notices)1
- clippings (information artifacts)1
- correspondence1