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2007
Utah Off-Highway Vehicle Laws and Rules, Utah DNR State Parks
1981
Off-Road Vehicular Destabilization of Hillslopes: The Major Contributing Factor to Destructive Debris Flows in Ogden, Utah, 1979, John K. Nakata
1980
Evaluation of Areas for Off-Road Recreational Motorcycle Use, Volume I: Evaluation Method, United States Army Corps of Engineers
Evaluation of Areas for Off-Road Recreational Motorcycle Use, Volume II: Alternate Soil Suitability Determination Methods, United States Army Corps of Engineers