1. Main reading room of the National Library of Medicine Author(s): Bredland, Ralph. Publication: 1969 Subject(s): Libraries, MedicalLibrary MaterialsAfrican AmericansNational Library of Medicine (U.S.). Reference Services Division.
2. 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.
3. [Pearl Caldwell working with microfilm reels] Author(s): Bredland, Ralph. Publication: [1969?] Subject(s): MicrofilmingAfrican AmericansNational Library of Medicine (U.S.). Reference Services Division.
4. 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.