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2. (1982): “Benchmarks in Agricultural Safety.” Paper no. 82–5507, St. Joseph, MI: American Society of Agricultural Engineers.
3. , , (1976): “A Farm Accident Study in California.” Extension Special Publication 3066. Davis, CA: University of California.
4. Coast Guard (1989): “Data on Fishing Vessel Casualties Reported to the U.S. Coast Guard, 1981–1987.” Marine Investigation Division, Marine Safety Evaluation Branch.
5. , (1977): “A Summary of the 1976 Indiana Farm Accident Survey With a Brief Analysis of Fatalities on Indiana Farms, 1973–1976.” West Lafayette, IN: Extension Service, Purdue University.