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robert gal
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Predicting Rainfall-erosion Losses from Cropland East of the Rocky Mountains
Axel Langvad Andersen, Betty B. Peterkin, Charles Edwin Burkhead, Gerald J. King, Joseph Henry Stoeckeler, Walter H. Wischmeier, Dwight David Smith, Paul E Slabaugh, Robert Harold Miller · Yayınevi bilinmiyor
1152 sayfa · 1965
Agricultural laws and legislation
