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Medium
- black-and-white negatives41
- photographs40
- negatives (photographs)39
- black-and-white photographs29
- black-and-white transparencies12
- videocassettes5
- film (material by form)3
- color films (visual works)2
- videotapes2
- U-matic (TM)1
- articles1
- color photographs1
- files (document groupings)1
- instructional materials1
- interactive resource1
- lesson plans1
- news1
- oral histories (literary works)1
- speeches1
- telegrams1