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MLA

Robertson, D.W, and Robert Gardner. "Factors Affecting Chlorosis In Irrigated Wheat." , 511-520.. Print

APA

Robertson, D., & Gardner, R. (0000). Factors Affecting Chlorosis in Irrigated Wheat.

Chicago

Robertson, D.W., and Robert Gardner. "Factors Affecting Chlorosis in Irrigated Wheat" (1937): 511-520..