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MLA

Helms, J.D, K.H Reinhardt, and G.A Margheim. "Agriculture That Fits the Environment: a Look Backward and Forward." , 9-15.. Print

APA

Helms, J., Reinhardt, K., & Margheim, G. (0000). Agriculture that fits the environment: a look backward and forward.

Chicago

Helms, J.D., K.H Reinhardt, and G.A Margheim. "Agriculture that fits the environment: a look backward and forward" (1991): 9-15..