1907 1 10 QUAKER CITY SHOW WINS OVER HANDICAPS article THE AUTOMOBILE page 66 AACA Library

1907 1 10 QUAKER CITY SHOW WINS OVER HANDICAPS article THE AUTOMOBILE page 67 AACA Library

1909 8 4 Commercial Applications The Taxicab Business in Philadelphia By H. J. D. Bergdoll (top middle column) article THE HORSELESS AGE page 136 AACA Library

1912 1 11 Bergdoll Changes and Improvements for 1912 On Cars in Grand Central Palace Show article MOTOR AGE pages 18 & 19 AACA Library

1912 1 11 Bergdoll Changes and Improvements for 1912 On Cars in Grand Central Palace Show article MOTOR AGE pages 20 & 21 AACA Library

1912 1 18 Bergdoll Cars Power Range 30-40 Price Range $1,500-$3,000 article THE MOTOR WORLD page 420 AACA Library