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Medium
- instructional materials7
- black-and-white photographs5
- sound recordings5
- teaching guides5
- timelines (chronologies)5
- articles4
- letters (correspondence)4
- photographs3
- fliers (printed matter)2
- legislative records2
- news2
- resource units2
- unedited footage2
- biographies1
- biographies (literary works)1
- checks (bank checks)1
- covers (gathered matter components)1
- documents1
- editorial cartoons1
- film negatives1