1. Letter from L. H. Gray to Rosalind Franklin Publication: Produced: 25 February 1957 Subject(s): Tobacco Mosaic VirusCrystallography, X-Ray Archival Collection: The Rosalind Franklin Papers (Profiles in Science)
2. Letter from L. H. Gray to Rosalind Franklin Publication: Produced: 20 March 1957 Subject(s): Tobacco Mosaic VirusCrystallography, X-Ray Archival Collection: The Rosalind Franklin Papers (Profiles in Science)