1. Letter from Joshua Lederberg to Francis J. Ryan Publication: Produced: 31 May 1952 Subject(s): Genetics, MicrobialProfessional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Henry A. Lardy Publication: Produced: 24 July 1950 Subject(s): Fellowships and ScholarshipsProfessional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
3. Letter from Joshua Lederberg to Evaline McNary Publication: Produced: 24 March 1953 Subject(s): Professional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
4. Letter from Joshua Lederberg to "Whom It May Concern" Publication: Produced: 7 October 1949 Subject(s): Professional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
5. Letter from Joshua Lederberg to Ernst Mayr Publication: Produced: 15 November 1956 Subject(s): Professional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
6. Letter from Ernst Mayr to Joshua Lederberg Publication: Produced: 14 November 1956 Subject(s): Professional Competence Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
