1. Miss Frances Joseph operates the preservation camera Author(s): Bredland, Ralph. Publication: 1969 Subject(s): MicrofilmingAfrican AmericansNational Library of Medicine (U.S.). Reference Services Division.
2. [Pearl Caldwell working with microfilm reels] Author(s): Bredland, Ralph. Publication: [1969?] Subject(s): MicrofilmingAfrican AmericansNational Library of Medicine (U.S.). Reference Services Division.
3. Mrs. Pearl Caldwell operates the MacBeth densitometer Author(s): Bredland, Ralph. Publication: 1969 Subject(s): MicrofilmingAfrican AmericansNational Library of Medicine (U.S.). Reference Services Division.
