1991 United States Grand Prix. : 1991 United States Grand Prix. Phoenix, Arizona, U.S A. 8-10 March 1991. Emanuele Pirro (Dallara 191 Judd). He exited the race with a gearbox failure. Ref-91 USA 11. World Copyright - LAT Photographic
1991 United States Grand Prix.
Phoenix, Arizona, U.S
A.
8-10 March 1991.
Emanuele Pirro (Dallara 191 Judd). He exited the race with a gearbox failure.
Ref-91 USA 11.
World Copyright - LAT Photographic