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 26 Indy 500 22 Cars Qualify for Indianapolis 500-Mile Sweepstakes MOTOR WORLD
1915 5 26 Indy 500 Characteristics of Entries From the Foreign Field MOTOR WORLD
1915 5 26 Indy 500 Valve-in-the-head Motor Supreme in List of Entries MOTOR WORLD
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 Indy 500 De Palma, in Mercedes, Wins at 89.84 m.p.h. THE AUTOMOBILE
1915 6 3 Indy 500 Lap-by-Lap Story of Ralph dePalma's Spectacular Victory -- How the 500-MileClassic Was Run and Won By Harry A. Tarantous MOTOR AGE
1915 6 3 Indy 500 Mechanical Lessons Taught in Record-Breaking Contest by Darwin S. Hatch MOTOR 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
1915 6 3 Indy 500 500-Mile Races Echos from the Resonant Saucer of Speed article MOTOR AGE 8.75″×11.75″ page 11