Author
Philadelphia Record
5
Philadelphia Ride the Ducks
3
Armour Institute of Technology
1
Autocar Company
1
Bell, D. Sargent, 1876-194-
1
Bill Springfield
1
Boyertown Museum of Historic Vehicles
1
Chilton Company
1
Easton, Alexander
1
Pennsylvania Dept. of Transportation
1
Schreiber, Alexander
1
Super Ducks
1
Williams, Guy Neal
1
Zausner, Robert, 1953-
1