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Medium
- documents (object genre)443
- files (digital files)109
- black-and-white photographs69
- documentary photographs56
- gelatin silver prints56
- audiocassettes10
- press releases8
- instructional materials6
- moving images6
- news6
- telegrams6
- unedited footage6
- articles4
- lesson plans4
- photographs4
- sound recordings4
- finding aids3
- letters (correspondence)3
- printed ephemera3
- timelines (chronologies)3