1909 10 27 NATIONAL, CHALMERS-DETROIT Vanderbilt Cup News THE HORSELESS AGE AACA page 475
1909 10 29 NATIONAL, CHALMERS-DETROIT MIRACULOUS DEATH NEAR IN VANDERBILT CUP RACE COURSE PRACTICE Los Angeles Times page 16
1909 10 NATIONAL, CHALMERS-DETROIT Summary of Events (1909) Indianapolis Motor Speedway: 2. National driven by Aiken 10. National, driven by Oldfield MOTOR PRINT magazine October 1909 11″x14″ page 11