Displaying results 1 of 4 - 4
Date Innovation City State Country Society
1952 Ditch Witch DWP Service-Line Trencher Perry OK USA ASME
1933 Graham-Hoeme Chisel Plow Hooker OK USA ASABE
1948 The USDA Small Watershed Program Stillwater OK USA ASABE
1935 Vegetated Waterways Stillwater OK USA ASABE
Displaying results 1 of 4 - 4

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