File:Chicago trolley bus 9567, North & Narragansett loop, 1968.jpg - Wikimedia Commons
Historic Chicago Buses – The Trolley Dodger
The Digital Research Library of Illinois History Journal™ : Electric Streetcars, Trolley Buses, and the move to gas-powered buses in Chicago.
Historic Chicago Buses, Part Three – The Trolley Dodger
File:Chicago Marmon 9728 on route 85-Central Ave, 1968.jpg - Wikipedia
The Last Trolley Bus in Chicago (3-24-1973) | Chicago History Today
The Last Trolley Bus in Chicago (3-24-1973) | Chicago History Today
I Found A Century Of Incredible Transit Bus History At A Train Museum - The Autopian
Chicago Transit Authority 9553 - Illinois Railway Museum
Historic Chicago Buses – The Trolley Dodger
Chicago Transit Authority 9631 - Illinois Railway Museum
File:Chicago Brill trolley bus 9281 loading on route 72-North Ave at Clark St in 1967.jpg - Wikimedia Commons
Chicago Surface Lines - Wikipedia
The Last Trolley Bus in Chicago (3-24-1973) | Chicago History Today
North Avenue Trolley Bus Trip | Chicago History Today
Chicago Transit Authority - In 1930 Chicago Transit Authority predecessor Chicago Surface Lines established the first trolley bus routes in the city with a fleet of trolley buses including an order built
Chicago Trolley & Double Decker Co. - Tour Map | Chicago bus, Chicago vacation, Chicago tours
File:Chicago St Louis Car-built trolley bus 9400 in 1968.jpg - Wikimedia Commons
Disused Turnarounds | Forgotten Chicago
The Twilight of Chicago Trolley Buses | Chicago History Today
The Last Trolley Bus in Chicago (3-24-1973) | Chicago History Today
I Found A Century Of Incredible Transit Bus History At A Train Museum - The Autopian
Chicago Trolley ending its service - Chicago Sun-Times
Chicago Streetcars
The Twilight of Chicago Trolley Buses | Chicago History Today
