Titles
- Letter from Francis Crick to Eric I. Hamilton1
- Letter from Francis Crick to Leslie E. Orgel1
- Letter from Francis Crick to Paul Berg7
- Letter from Fred C. Ikle to Joshua Lederberg1
- Letter from G. J. V. Nossal to Joshua Lederberg2
- Letter from G. J. V. Nossal, Walter & Eliza Hall Institute of Medical Research to Joshua Lederberg2
- Letter from George Schaefer to Joshua Lederberg1
- Letter from Gerald D. Laubach, Pfizer, Inc. to Joshua Lederberg1
- Letter from Harold Margulies to United States. Regional Medical Programs Service2
- Letter from Harold Varmus to E. C. C. Lin, Harvard Medical School1
- Letter from Harold Varmus to Ian Macpherson, Imperial Cancer Research Fund Laboratories1
- Letter from Harold Varmus to Paul Hough, Cold Spring Harbor Laboratory1
- Letter from Harriet Zuckerman to Joshua Lederberg1
- Letter from Hartmut Braun to Joshua Lederberg1
- Letter from Henry C. Wallich to Joshua Lederberg1
- Letter from Herbert B. Pahl to United States. Regional Medical Programs Service and United States. Department of Health, Education, and Welfare2
- Letter from Herbert Gelernter to Natesa S. Sridharan1
- Letter from Herman A. Witkin to Joshua Lederberg1
- Letter from I. Dostrovsky, Weizmann Institute of Science to Joshua Lederberg3
- Letter from Irene S. Forrest to Joshua Lederberg1