References

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Gordon, R.B., 1969, The natural vegetation of Ohio in pioneer days: Columbus, Ohio, Bulletin of the Ohio Biological Survey, v. III, no. 2, Ohio State University, 113 p.

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Wafer, C.C., Barrett Richards, J. and Osmond, D.L., 2004, Construction of Platinum-Tipped Redox Probes for Determining Soil Redox Potential. Journal of Environmental Quality. Vol. 33. No. 6.