61. Letter from George W. Beadle to Barbara McClintock Publication: Produced: 17 February 1972 Subject(s): Zea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
62. Letter from Barbara McClintock to George W. Beadle Publication: Produced: 24 February 1972 Subject(s): Zea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
63. Spontaneous Alterations in Chromosome Size and Form in Zea Mays Publication: Cold Spring Harbor Laboratory. Press, 1941 Subject(s): Zea maysChromosomesMutationGene Expression RegulationCrossing Over, GeneticChromosome BreakageRing Chromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
64. Six Plants Examined in Each Race Publication: Produced: 15 July 1963 Subject(s): Zea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
65. 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)
66. 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)
67. 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)
68. 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)
69. 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)
70. 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)
