1915 Indy 500

1915 5 19 Getting Ready for the International Sweepstakes By Jerome T. Shaw THE HORSELESS AGE
1915 5 23 New York THE SUN newspaper Indy 500
1915 5 27 Valve-in-Head Motor Supreme THE AUTOMOBILE
1915 6 2 World's Records Made in 500-Mile Sweepstakes THE HORSELESS AGE
1915 6 3 Ralph De Palma Wins Indianapolis Classic in Record Time By J. C. Burton MOTOR AGE
1915 Indy 500 Full Account SEARS, ROEBUCK & CO Catalog
1915 Set of SPEEDWAY DRIVER postcards
1915 5 27 Steel and Nerve at the Indianapolis Oval article Leslie’s Illustrated Weekly Newspaper 10.25×15 page 512