Donald G. Balius, Sr. image from his obituary in the Sun Herald (Biloxi – Gulfport Mississippi) in April 2009.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart
Four Volume Review of the Boating Industry’s Boat Propeller Guard Product Liability Defense