1917 9 6 De Palma and Chevrolet Share Honors By William K. Gibbs MOTOR AGE
1917 9 6 A. B. C. of Aviation article MOTOR AGE 8.5″×11.75″ page 17 only
1917 9 6 De Palma and Chevrolet Share Honors By William K. Gibbs article MOTOR AGE 8.5″×11.75″ page 18
1917 9 6 De Palma and Chevrolet Share Honors By William K. Gibbs article MOTOR AGE 8.5″×11.75″ page 19
1917 9 6 With BETHLEHAM SPARK PLUGS De Palma ad MOTOR AGE 8.5″×11.75″ page 75