1. Personal watercraft injuries;Vernberg;JAMA,1990
2. Personal watercraft riders leave wake of injuries, angry boaters;Bruske,1989
3. Jet scooters are zipping through troubled waters;Gadzik,1990
4. Trouble in their wake: Personal watercraft can create a public nuisance;Gibbs;Time,1989
5. Boating Statistics 1989;United States Coast Guard,1990