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Citation
Koch, B. L., R. P. Covey, Jr., and W. Haglund. 1980. “Effect of Soil Fumugation on the Early Growth and Production of 'Delicious' Apple Trees.” Special Collections, USDA National Agricultural Library. Accessed August 21, 2024, https://www.nal.usda.gov/exhibits/speccoll/items/show/5479.