Titles
- Letter from John O'Brien to Joshua Lederberg2
- Letter from Kenneth V. Thimann to Joshua Lederberg2
- Letter from Michael E. DeBakey to Rudolph Matas2
- Letter from Peter Armitage to Joshua Lederberg2
- Letter from R. G. E. Murray to Joshua Lederberg2
- Letter from Rudolph Matas to Michael E. DeBakey2
- Letter from S. Gaylen Bradley to Joshua Lederberg2
- Letter from Salvador E. Luria to Joshua Lederberg2
- Letter from Samuel Graff to Joshua Lederberg2
- Letter from Seymour Benzer to Joshua Lederberg2
- Letter from Stuart Mudd to Joshua Lederberg2
- Letter from Theodore T. Puck to Joshua Lederberg2
- Letter from William Hayes to Luca Cavalli-Sforza2
- Medical Society of the District of Columbia: Annual Scientific Assembly2
- Middlesex Hospital, London, England: Children's ward2
- Postcard from William Hayes to Joshua Lederberg2
- [John F. Fulton]2
- A Fantasy by C. H. Andrewes1
- A Proposal for a New Method of Evaluation of the Newborn Infant1
- A Study of the Life Cycle of an Actinomycete1