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Citation
Sarget, J. A. and G. E. Blackman. 1969. “Studies on Foliar Penetration, IV. Mechanisms Controlling the Rate of Penetration of 2,4-Dichlorophenoxyacetic Acid (2,4D) into Leaves of Phaseolus vulgaris.” Special Collections, USDA National Agricultural Library. Accessed October 15, 2026, https://www.nal.usda.gov/exhibits/speccoll/items/show/4459.
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