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MLA

Smith, C.L, and J.G Waugh. "Seasonal Variations In the Carbohydrate and Nitrogen Content of Roots of Bearing Pecan Trees." , 449-460.. Print

APA

Smith, C., & Waugh, J. (0000). Seasonal Variations in the Carbohydrate and Nitrogen Content of Roots of Bearing Pecan Trees.

Chicago

Smith, C.L., and J.G Waugh. "Seasonal Variations in the Carbohydrate and Nitrogen Content of Roots of Bearing Pecan Trees" (1938): 449-460..