Safety Evaluation of the Pump Jet Propulsion Assembly for the Military Amphibious Reconnaissance System. U.S. Marine Corps 1992 report related to propeller safety.
Aspects of the Propeller Safety Debate chart
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart