11. Letter from Harold Varmus to Mike Fried, Art, Herman and Nancy Quintrell Publication: Produced: [1978] Subject(s): Avian Sarcoma VirusesDNA, ViralRNA, Viral Archival Collection: The Harold Varmus Papers (Profiles in Science)
12. Letter from Harold Varmus to Roel Nusse Publication: Produced: [28 March 1979] Subject(s): Mammary Tumor Virus, MouseDNA, ViralRNA, Viral Archival Collection: The Harold Varmus Papers (Profiles in Science)
13. Letter from Harold Varmus to Inder M. Verma, Imperial Cancer Research Fund Laboratories Publication: Produced: [1979] Subject(s): Avian Sarcoma VirusesRNA, Viral Archival Collection: The Harold Varmus Papers (Profiles in Science)
14. Letter from Harold Varmus and J. Michael Bishop to Robert J. Huebner, National Cancer Institute Publication: Produced: 22 February 1972 Subject(s): Financing, OrganizedRNA, ViralPeer Review, Research Archival Collection: The Harold Varmus Papers (Profiles in Science)