1. Letter from Gardner Middlebrook to Joshua Lederberg Publication: Produced: 1 April 1954 Subject(s): Drug Resistance, MicrobialMutationGenetics, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Jacques Monod Publication: Produced: 6 October 1948 Subject(s): Genetics, MicrobialRecombination, GeneticDrug Resistance, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)