- Wemjournal.org (Wilderness and Environmental Medicine)
- American Academy of Dermatology
- Hauser, Susan; A Field Guide to Poison Ivy, Oak and Sumac (Connecticut: Falcon Guides, The Globe Pequot Press, 2008).
- “Ambulatory Care Medical Utilization Estimates for 2007.” US Department of Health and Human Services (2011).
- Brian P. McCall, Irwin Horwitz, Steven Feldman, Rajesh Balkrishnan, “Incidence Rates, Costs, Severity, and Work-Related Factors of Occupational Dermatitis - A Workers’ Compensation Analysis of Oregon, 1990-1997,” Arch Dermatol., (2005).