1. Letter from Joshua Lederberg to Ellis Englesberg Publication: Produced: 16 April 1950 Subject(s): Fellowships and ScholarshipsMutagenicity Tests Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to H. J. Muller Publication: Produced: 20 March 1950 Subject(s): Mutagenicity Tests Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
3. Letter from Joshua Lederberg to H. J. Muller Publication: Produced: 15 March 1950 Subject(s): Mutagenicity TestsResearch Design Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
4. Letter from H. J. Muller to Joshua Lederberg Publication: Produced: 16 March 1950 Subject(s): Mutagenicity TestsResearch Design Archival Collection: The Joshua Lederberg Papers (Profiles in Science)