41. Maize Genetics Publication: Carnegie Institution of Washington, 1942 Subject(s): Chromosome BreakageZea maysGeneticsGenes, PlantRing Chromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
42. Maize Genetics Publication: Carnegie Institution of Washington, 1943 Subject(s): Chromosome BreakageCrossing Over, GeneticMutationZea maysGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
43. Chromosome Constitutions of Mexican and Guatemalan Races of Maize Publication: Carnegie Institution of Washington, 1960 Subject(s): CytogeneticsZea maysChromosome MappingGeneticsGenes, Plant Archival Collection: The Barbara McClintock Papers (Profiles in Science)
44. 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)
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 William L. Brown to Almiro Blumenschein Publication: Produced: 30 August 1965 Subject(s): South AmericaZea maysGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
47. Letter from Major M. Goodman to William L. Brown Publication: Produced: 21 June 1966 Subject(s): Zea maysGeneticsData Interpretation, Statistical Archival Collection: The Barbara McClintock Papers (Profiles in Science)
48. Letter from Charles R. Burnham to Barbara McClintock Publication: Produced: 19 June 1983 Subject(s): GeneticsZea mays Archival Collection: The Barbara McClintock Papers (Profiles in Science)
49. Letter from J. R. S. Fincham to Barbara McClintock Publication: Produced: 8 July 1973 Subject(s): Genetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
50. Letter from Barbara McClintock to Melvin Green Publication: Produced: 27 February 1968 Subject(s): MutationGeneticsGene Expression Regulation Archival Collection: The Barbara McClintock Papers (Profiles in Science)