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

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 June 23, 2017, https://www.nal.usda.gov/exhibits/speccoll/items/show/7009.