1922 Jul 30 Detroit Free Press
1925 Jun 28 Chicago Tribune
1925 - Automotive
1926 May Outdoor Recreation 1
1926 May Outdoor Recreation 2
1927 May Outdoor Recreation
1928 Automobile Industry
1928 June - Popular Mechanics
1928 Advertisement
1937 May - Popular Mechanics
1921 Dec 17 Michigan Financial Review
1920 Camping Trailer
1934 Oct 12 Detroit Free Press
1938 Oct 13 Detroit Free Press
Vintage Photo Zagelmeyer
Vintage Photo Zagelmeyer
US Patent 1,304,440
US Patent 1,308,139
US Patent 1,527,105
US Patent 1,650,253
US Patent 2,104,576
US Patent 2,125,479