1914 5 28 Indy 500 Valves in Head Predominate at Speedway article THE AUTOMOBILE 8.5″×11.5′ page 1109
1914 5 28 Indy 500 Valves in Head Predominate at Speedway article THE AUTOMOBILE 8.5″×11.5″ page 1106
1914 5 28 Indy 500 Valves in Head Predominate at Speedway article THE AUTOMOBILE 8.5″×11.5″ page 1107