Ikerd, J. E. (2008). Crisis and opportunity: Sustainability in American agriculture. University of Nebraska Press.
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Chicago-čujuhus (17. p.)
Ikerd, John E. Crisis and Opportunity: Sustainability in American Agriculture. Lincoln: University of Nebraska Press, 2008.
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MLA-čujuhus (9. p.)
Ikerd, John E. Crisis and Opportunity: Sustainability in American Agriculture. University of Nebraska Press, 2008.
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