11. Letter from Barbara McClintock to Angel Kato Publication: Produced: 6 January 1964 Subject(s): Zea mays Archival Collection: The Barbara McClintock Papers (Profiles in Science)
12. Letter from Maxine Singer to James D. Watson Publication: Produced: 4 December 1964 Subject(s): Ribonucleases Archival Collection: The Maxine Singer Papers (Profiles in Science)
13. Letter from Mary Lasker to James A. Shannon Publication: Produced: 17 July 1964 Subject(s): NeoplasmsResearch Support as TopicContracts Archival Collection: The Mary Lasker Papers (Profiles in Science)
14. Letter from Laurence O. Pilgeram to Michael E. DeBakey Publication: Produced: 16 December 1964 Subject(s): ArteriosclerosisCorrespondence as TopicResearch Support as Topic Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
15. Letter from Morris Fishbein to Michael E. DeBakey Publication: Produced: 23 December 1964 Subject(s): Correspondence as TopicHeart DiseasesHealth Planning Support Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
16. Letter from Michael E. DeBakey to Alton Ochsner Publication: Produced: 15 December 1964 Subject(s): Correspondence as Topic Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
17. Letter from Alton Ochsner to Michael E. DeBakey Publication: Produced: 23 December 1964 Subject(s): Correspondence as Topic Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
18. Letter from Sister M. Consolata to Michael E. DeBakey Publication: Produced: 16 December 1964 Subject(s): Correspondence as TopicCardiovascular DiseasesResearch Support as Topic Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
19. Letter from Edidio Guertzenstein to Michael E. DeBakey Publication: Produced: 13 December 1964 Subject(s): Correspondence as TopicCardiovascular DiseasesResearch Support as TopicBrazil Archival Collection: The Regional Medical Programs Collection (Profiles in Science)
20. Letter from Paul David to Michael E. DeBakey Publication: Produced: 24 December 1964 Subject(s): Correspondence as TopicHeart DiseasesResearch Support as TopicCanada Archival Collection: The Regional Medical Programs Collection (Profiles in Science)