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MLA

Cooper, H.P, Oswald Schreiner, and B.E Brown. "Soil Potassium In Relation to Soil Fertility." , 397-405.. Print

APA

Cooper, H., Schreiner, O., & Brown, B. (0000). Soil Potassium in Relation to Soil Fertility.

Chicago

Cooper, H.P., Oswald Schreiner, and B.E Brown. "Soil Potassium in Relation to Soil Fertility" (1938): 397-405..