www.rumbledrome.com

Wikipedia: Yonkers Raceway & Empire City Casino

Anchor text: "Barney Oldfield"

Wikipedia: Barney Oldfield

Anchor text: Race results

Wikipedia: Wetteroth

Wikipedia: List of fatalities at the Indianapolis Motor Speedway

Anchor text: Website for the 1915 Astor Cup race & Sheepshead Bay race details

Wikipedia: Astor Cup (auto race)

Anchor text: rumbledrome.com

Wikipedia: Wikipedia:Articles for deletion/American Championship Car Racing

Anchor text: From Motor, The Automotive Business Magazine, June 1933

Wikipedia: Lester Spangler

Anchor text: Motor - The Automotive Business Magazine, June 1933

Wikipedia: Mark Billman