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Farming in Cumberland County in the claypan region of Southern Illinois : a study of the effect of differences in soil and topography
- "Farming in Cumberland County in the claypan region of Southern Illinois : a study of the effect of differences in soil and topography"@en
- "Farming in Cumberland County in the claypan region of Southern Illinois a study of the effect of differences in soil and topography"@en
- "Farming in Cumberland County : in the Claypan Region of Southern Illinois ; a study of the effect of differences in soil and topography"