: History – Hans Etzrodt’s description of the annual regulations, and changes. Retrieved 7 Jun 2019 GEL Motorsport Information Page - Darren Galpan’s list of the races, entrants and winners. Retrieved 5 Jul 2019 Motorsport Memorial – motor-racing deaths by year. Retrieved 5 Jul 2019 La Targa Florio – race report of the Targa Florio race. Retrieved 5 Jul 2019 Grand Prix History – history of the Targa Florio race. Retrieved 7 Jul 2019 Grand Prix seasons