The 1971 Dutch Grand Prix was won by Jacky Ickx of Ferrari.
The race in Netherland was round 4 of 11 of the 1971 season.
The 1971 Dutch Grand Prix was a Formula One motor race held at Zandvoort on June 20, 1971. It was race 4 of 11 in both the 1971 World Championship of Drivers and the 1971 International Cup for Formula One Manufacturers. Due to heavy rain, the track was treacherously wet and slippery, giving a large advantage to "wet-weather men" Ickx and Rodriguez, who also happened to be equipped with highly suitable cars and tyres.
This was the last Formula One race on a circuit with no safety features on it. Because of this the Dutch Grand Prix was canceled the next year, but the circuit came back in 1973; and the layout had been modified.
source: Wikipedia
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