Henry (1985) p.55 This agreement was not reached until November 1965, weeks before the first Formula One race to the new regulations, the non-championship South African Grand Prix on 1 January 1966.
Henry (1985) p.55 This agreement was not reached until November 1965. Pinder (1995) p.43, weeks before the first Formula One race to the new regulations, the non-championship South African Grand Prix on 1 January 1966.