2021 DecemberROTOR MagazineLast Hover Harold Summers (ROTOR) - HAI director of flight operations was an industry icon.ROTOR StaffJanuary 18, 2022
2021 DecemberROTOR MagazineLast Hover Alvin S. Trenk (ROTOR) - Entrepreneur Alvin S. Trenk formed several aviation businesses over a 50-year career.ROTOR StaffJanuary 18, 2022
