1. Repanshek K. National park visitation in 2012 rose to nearly 283 million. National Parks Traveler. Available at: http://www.nationalparkstraveler.com. Accessed February 15, 2013.
2. Centers for Disease Control and Prevention. Lightning-associated deaths-United States, 1980-1995. Morbidity Mortality Weekly Reports. 391–394. Washington, DC: Centers for Disease Control and Prevention; 1998.
3. Wilderness Medical Society practice guidelines for the prevention and treatment of lightning injuries;Davis;Wilderness Environ Med,2012
4. American Red Cross. Be Red Cross ready—thunderstorm safety checklist. Available at: http://www.redcross.org/images/media_customproductcatalog/m4340185_thunderstorm.pdf. Accessed January 21, 2014.
5. National Oceanic and Atmospheric Administration. Weather safety: lightning safety preparedness and fact sheet. Available at: http://www.weather.gov/os/lightning/pdfs/lightning-safety.pdf. Accessed November 4, 2009.