11. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 4 April 1930 Subject(s): ChromosomesZea maysCrossing Over, GeneticCytogenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
12. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 23 January 1930 Subject(s): Zea maysChromosomesCrossing Over, GeneticJob Satisfaction Archival Collection: The Barbara McClintock Papers (Profiles in Science)
13. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 20 February 1930 Subject(s): Zea maysStaining and Labeling Archival Collection: The Barbara McClintock Papers (Profiles in Science)
14. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 6 February 1931 Subject(s): ChromosomesGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
15. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 12 March 1931 Subject(s): ChromosomesGenes, PlantCrossing Over, Genetic Archival Collection: The Barbara McClintock Papers (Profiles in Science)
16. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 11 April 1931 Subject(s): Zea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
17. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 12 May 1931 Subject(s): ChromosomesZea maysGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
18. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 11 June 1931 Subject(s): ChromosomesGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
19. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 26 June 1931 Subject(s): GeneticsZea maysMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
20. Letter from Barbara McClintock to Charles R. Burnham Publication: Produced: 30 July 1931 Subject(s): GeneticsZea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)