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Medium
- instructional materials6
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- sound recordings4
- timelines (chronologies)4
- photographs3
- correspondence2
- interviews2
- learning modules2
- legislative records2
- letters (correspondence)2
- maps2
- oral histories (literary works)2
- annotated bibliographies1
- black-and-white photographs1
- encyclopedias1
- lesson plans1
- maps (documents)1
- newsletters1
- records1