1. Off-highway vehicle recreation in the United States, regions, and states: A national report from the national survey on recreation and the environment (NSRE)http://www.fs.fed.us/recreation/programs/ohv/OHV_final_report.pdf
2. Surge in off-roading stirs dust and debate in Westhttp://www.nytimes.com/2007/12/30/us/30lands.html?scp=1&sq=off-highway%20vehicle&st=cse#
3. Recreational Off-Highway Vehicle Use on Public Lands within Utah;Burr,2008
4. Pennsylvania's ATV Riders and Their Needs;Lord,2004
5. Tennessee OHV User Survey;Fly,2002