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Photograph of Edward F. Knipling with colleagues inspecting pupae on conveyor belt

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Citation

Agricultural Research Service, United States Department of Agriculture. “Photograph of Edward F. Knipling with colleagues inspecting pupae on conveyor belt.” Special Collections, USDA National Agricultural Library. Accessed November 24, 2017, https://www.nal.usda.gov/exhibits/speccoll/items/show/7009.