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Medium
- instructional materials20
- interviews[remove]20
- teaching guides20
- resource units19
- transcripts16
- oral histories (literary works)14
- video recordings (physical artifacts)6
- annotated bibliographies1
- articles1
- correspondence1
- fliers (printed matter)1
- learning modules1
- maps1
- newsletters1
- photographs1
- records1
- reports1
- slide shows1
- sound recordings1
- timelines (chronologies)1