Titles
- Letter from A. Felix to Jean Creze1
- Letter from A. Felix to Joshua Lederberg11
- Letter from A. G. Wilson and Zdenek Kopal, Icarus Magazine to Joshua Lederberg1
- Letter from A. H. Doermann to Joshua Lederberg3
- Letter from A. H. Doermann to Salvador E. Luria1
- Letter from A. H. Sturtevant to Joshua Lederberg2
- Letter from A. Harry Passow to Joshua Lederberg1
- Letter from A. J. Bateman, Christie Hospital & Holt Radium Institute to Joshua Lederberg2
- Letter from A. J. Kluyver to Joshua Lederberg2
- Letter from A. J. Kluyver to Perry W. Wilson1
- Letter from A. J. Kluyver to W. H. Peterson1
- Letter from A. J. Metcalfe to Joshua Lederberg1
- Letter from A. J. Riker to Joshua Lederberg1
- Letter from A. J. Riker to the Friends of Clarence S. Hean1
- Letter from A. J. Salle to Joshua Lederberg2
- Letter from A. J. Van Rensburg to Joshua Lederberg1
- Letter from A. K. Bhattacharyya to Joshua Lederberg2
- Letter from A. K. Garven to Joshua Lederberg1
- Letter from A. Klopstock to Joshua Lederberg1
- Letter from A. L. Kappus to Joshua Lederberg2