Caption: "Planting a sorghum experiment by hand." RF photo #24723d.
Rockefeller Archive Center, Rockefeller Foundation records, photographs, series 497D, box 134, folder 2579
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Rockefeller Foundation, “Workers in field and labs,” 100 Years: The Rockefeller Foundation, accessed March 25, 2017, http://rockefeller100.org/items/show/2759.