Titles
- Letter from Bill Thomson to Joshua Lederberg1
- Letter from Bill Thomson to Joshua and Esther Lederberg1
- Letter from Boris Ephrussi to Joshua Lederberg1
- Letter from Burton A. Waisbren to Joshua Lederberg3
- Letter from C. A. Elvehjem to Joshua Lederberg1
- Letter from C. B. Van Niel to Joshua and Esther Lederberg1
- Letter from C. Barigozzi to Joshua Lederberg2
- Letter from C. C. Little to Joshua Lederberg1
- Letter from C. Phillip Miller to Joshua Lederberg2
- Letter from Cecilie Leuchtenberger to Joshua Lederberg1
- Letter from Cezar Antonio Elias to Joshua Lederberg2
- Letter from Charles W. Todd, E. I. du Pont de Nemours & Co. to Joshua Lederberg1
- Letter from Clive C. Spicer to Joshua Lederberg5
- Letter from Columbia University to Joshua Lederberg2
- Letter from Cyril N. Hinshelwood to Joshua Lederberg1
- Letter from D. H. Wenrich to Joshua Lederberg6
- Letter from D. W. Bruner to Joshua Lederberg2
- Letter from Daisy Kuhn to Joshua Lederberg1
- Letter from David M. Bonner to Joshua Lederberg2
- Letter from Dixy Lee Ray to Joshua Lederberg1