1. Civilian Helicopter Search and Rescue Accidents in the United States: 1980 Through 2013 
Gordon H. Worley, MSN, RN, FNP, EMT-P 
Wilderness & Environmental Medicine 
Volume 26, Issue 4, Pages (December 2015)
DOI: /j.wem
Copyright © 2015 Wilderness Medical Society Terms and Conditions

2. Figure
Total accidents (open bars) and fatal accidents (solid bars) by year.
Wilderness & Environmental Medicine  , DOI: ( /j.wem )
Copyright © 2015 Wilderness Medical Society Terms and Conditions