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Citation
Mahn, E. G. and K. Helmecke. 1979. “Effects Of Herbicide Treatment on the Structure and Functioning of Agro-Ecosystems. II. Structural Changes in the Plant Community after the Application of Herbicides over Several Years.” Special Collections, USDA National Agricultural Library. Accessed July 20, 2024, https://www.nal.usda.gov/exhibits/speccoll/items/show/4356.