221. Letter from Keith R. Yamamoto to Harold Varmus Publication: Produced: 5 October 1978 Subject(s): Oncogenic VirusesCloning, Molecular Archival Collection: The Harold Varmus Papers (Profiles in Science)
222. 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)