Syste, W, L, W, U, (, L, M, C, F, T, B, O, N.(1975).A Comparison of the Production, Economic Returns, and Energy-intensiveness of Corn Belt Farms that Do and Do Not Use Inorganic Fertilizers and Pesticides .:.
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Syste, William, Lockeretz;, Washington, University, (Saint, Louis;, Mo.)., Center, For, The, Biology, Of, Natural."A Comparison of the Production, Economic Returns, and Energy-intensiveness of Corn Belt Farms that Do and Do Not Use Inorganic Fertilizers and Pesticides".:,1975.Text.