1. 2012 Outdoor Recreation Participation Topline Report. Boulder, CO: The Outdoor Foundation; 2012.
2. motivations, and expectations of a commercial whitewater rafting experience;Fluker;J Travel Res,2000
3. West Virginia Whitewater Reports. Available at: http://bsc.wvdnr.biz/WhitewaterReports/default.aspx. Accessed July 15, 2012.
4. West Virginia Department of Natural Resources. West Virginia Legislative Rule §58-12-11. Available at: http://www.wvdnr.gov/LEnforce/white/rivermgt/regs.shtm. Accessed July 15, 2012.
5. Comparing the predictive powers of survival models using Harrell’s C or Somers’;Newson;D. Stata J,2010