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Bauer, Philip J.; May, O. Lloyd; Camberato, James J. . (1998). Planting Date and Potassium Fertility Effects on Cotton Yield and Fiber Properties. jpa, 11(4), 415–. doi:10.2134/jpa1998.0415 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research