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Medium
- black-and-white photographs[remove]10
- instructional materials10
- sound recordings8
- documentaries and factual works5
- articles4
- timelines (chronologies)4
- photographs3
- teaching guides3
- letters (correspondence)2
- slide shows2
- texts (document genres)2
- transcripts2
- web sites2
- annotated bibliographies1
- biographies1
- biographies (literary works)1
- correspondence1
- encyclopedias1
- lesson plans1
- maps (documents)1