O circuito Zeltweg no(a) Austria organizou o primeiro Grande Prêmio em 1964.
Zeltweg Air Base, now known as Fliegerhorst Hinterstoisser, is a military airfield in Styria, Austria near Zeltweg. It is the main airfield of the Austrian Air Force. It was also used as a motor racing circuit in the 1960s.
fonte: Wikipedia
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