Po, E. A. C. (2007). Soil aggregate stability: Cropping system effects, spatial variability and contribution to potato yield in Michigan. Michigan State University.
Citace podle Chicago (17th ed.)Po, Edgar Allan C. Soil Aggregate Stability: Cropping System Effects, Spatial Variability and Contribution to Potato Yield in Michigan. Ann Arbor: Michigan State University, 2007.
Citace podle MLA (9th ed.)Po, Edgar Allan C. Soil Aggregate Stability: Cropping System Effects, Spatial Variability and Contribution to Potato Yield in Michigan. Michigan State University, 2007.
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