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73 — The r/NASCAR Historian
1973 World Championship for Makes - Wikipedia
NASCAR Car Number 73 - driveraverages.com
1973 Datsun 240Z Race Car - Hagerty Media
10 Tall Tales from the 1973 Season - Nascar Hall of Fame
1947 Bugatti Type 73 Monoposto Race Car - Sports Car Market
NASCAR In 1973 — The 75 Years Edition - SPEED SPORT
Eagle 1973 Indy car-by-car histories - OldRacingCars.com
1973 3-litre Martini Porsche Carrera RSR - Stuttcars
Can-Am '73 December 1973 - Motor Sport Magazine