1. Letter from Barbara McClintock to William L. Brown Publication: Produced: 5 January 1962 Subject(s): Zea maysResearch Personnel Archival Collection: The Barbara McClintock Papers (Profiles in Science)
2. Letter from Barbara McClintock to William L. Brown Publication: Produced: 9 August 1966 Subject(s): ChromosomesZea maysMexicoCentral AmericaSouth America Archival Collection: The Barbara McClintock Papers (Profiles in Science)
3. Letter from Barbara McClintock to William L. Brown Publication: Produced: 24 July 1974 Subject(s): Zea maysChromosomesMaps as Topic Archival Collection: The Barbara McClintock Papers (Profiles in Science)
