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Medium
- instructional materials16
- oral histories (literary works)16
- resource units12
- teaching guides12
- transcripts9
- interviews8
- black-and-white negatives5
- color transparencies5
- video recordings (physical artifacts)5
- documents4
- sound recordings3
- speeches3
- fliers (printed matter)2
- photographic prints2
- color slides1
- film1
- legal documents1
- motion pictures (visual works)1
- moving images1
- programs (documents)1