Doodlebugs, half tractor, half car. History of these historic machines.
Doodlebugs.
1995 PONTIAC GRAND PRIX GT - AutoRestorer
Doodlebugs & Sperry Cars?
Reading switcher shoves frozen Doodlebug - Trains
The Short Line Doodlebug: Galloping Geese and Other Railcritters. Keilty, Edmund. Glendale, CA: Interurban Press, 1988. Hardcover, 152 pages, b&w
The Short Line Doodlebug vy Edmund Keilty HC 1988 Interurban Railroads FW
Here Come the Doodlebugs - AutoRestorer
Buying & Owning a Brake Lathe, Pt. 1 - AutoRestorer
The doodlebugs: A word and picture history of over six decades of self-propelled passenger car service on America's most colorful major railroad (The Chief way reference series) - McCall, John B: 9780930724016
Here Come the Doodlebugs - AutoRestorer