1. American Forest & Paper Association Economic Impacthttp://www.afandpa.org/our-industry/economic-impact
2. Safety and health in forest harvesting operations. Diagnosis and preventive actions. A review.
3. Injuries on mechanized logging operations in the southeastern United States in 2001;Roberts;For. Prod. J.,2005
4. Logging Injuries Continue Downward Trend;Shaffer,2003