Titles
- Letter from Daniel Nathans to Bernard Weisblum1
- Letter from Daniel Nathans to David McConnell1
- Letter from Daniel Nathans to Kathleen J. Danna1
- Letter from Daniel Nathans to Larry Gold1
- Letter from Daniel Nathans to Paul Berg1
- Letter from Daniel Nathans to Ray Wu1
- Letter from David M. Mumford to Joshua Lederberg1
- Letter from David McConnell to Daniel Nathans1
- Letter from Debi P. Burma to Maxine Singer1
- Letter from Dorothy T. Krieger to Joshua Lederberg1
- Letter from E. W. Littlefield to Joshua Lederberg1
- Letter from Emilio Weiss to Joshua Lederberg1
- Letter from Eric I. Hamilton to Francis Crick1
- Letter from Ernest Winocour to Daniel Nathans1
- Letter from Eugene Garfield to Orio Ciferri1
- Letter from Francis Crick to Eric I. Hamilton1
- Letter from Francis Crick to Leslie E. Orgel1
- Letter from Fred C. Ikle to Joshua Lederberg1
- Letter from George Schaefer to Joshua Lederberg1
- Letter from Gerald D. Laubach, Pfizer, Inc. to Joshua Lederberg1