41. Letter from Almiro Blumenschein to Barbara McClintock Publication: Produced: 5 August 1966 Subject(s): South AmericaGeneticsZea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
42. Letter from Barbara McClintock to Almiro Blumenschein Publication: Produced: 20 August 1966 Subject(s): ChromosomesZea maysCooperative BehaviorMaps as Topic Archival Collection: The Barbara McClintock Papers (Profiles in Science)
43. Letter from Barbara McClintock to Almiro Blumenschein Publication: Produced: 30 November 1966 Subject(s): ChromosomesZea mays Archival Collection: The Barbara McClintock Papers (Profiles in Science)
44. Letter from Barbara McClintock to F. G. Brieger Publication: Produced: 2 April 1962 Subject(s): ChromosomesZea mays Archival Collection: The Barbara McClintock Papers (Profiles in Science)
45. Memorandum from Barbara McClintock to William L. Brown Publication: Produced: February 1962 Subject(s): ChromosomesGeneticsGenes, PlantZea mays Archival Collection: The Barbara McClintock Papers (Profiles in Science)
46. 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)
47. 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)
48. Letter from Charles R. Burnham to Barbara McClintock Publication: Produced: 23 January 1931 Subject(s): Zea maysChromosomesFellowships and Scholarships Archival Collection: The Barbara McClintock Papers (Profiles in Science)
49. Letter from Charles R. Burnham to Barbara McClintock Publication: Produced: 5 October 1932 Subject(s): Zea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
50. Letter from Charles R. Burnham to Barbara McClintock Publication: Produced: 18 March 1984 Subject(s): Zea maysChromosomesCytogenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)