National Marine Manufacturers Association (NMMA) public comment letter on U.S. Coast Guard (USCG) proposed propeller strike and carbon monoxide rule USCG-2011-0497.
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Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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