Caption: "Hybridization in wheat begins with the removal of the anther from the flowers of the spoke. Southern experiment station." RF photo #24931.
Rockefeller Archive Center, Rockefeller Foundation records, photographs, series 309, box 71, folder 1535
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Rockefeller Foundation, “Chilean agricultural program,” 100 Years: The Rockefeller Foundation, accessed May 24, 2017, http://rockefeller100.org/items/show/2780.