![File:Chicago Brill trolley bus 9281 loading on route 72-North Ave at Clark St in 1967.jpg - Wikimedia Commons File:Chicago Brill trolley bus 9281 loading on route 72-North Ave at Clark St in 1967.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/2/23/Chicago_Brill_trolley_bus_9281_loading_on_route_72-North_Ave_at_Clark_St_in_1967.jpg)
File:Chicago Brill trolley bus 9281 loading on route 72-North Ave at Clark St in 1967.jpg - Wikimedia Commons
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The Digital Research Library of Illinois History Journal™ : Electric Streetcars, Trolley Buses, and the move to gas-powered buses in Chicago.
![The Digital Research Library of Illinois History Journal™ : Electric Streetcars, Trolley Buses, and the move to gas-powered buses in Chicago. The Digital Research Library of Illinois History Journal™ : Electric Streetcars, Trolley Buses, and the move to gas-powered buses in Chicago.](https://1.bp.blogspot.com/-pbnE5UKQeqI/X9a6uOuizsI/AAAAAAAAkBQ/rrbNNE76js4bDMrhjdwImW263ENK8XbdACLcBGAsYHQ/s1183/CTA%2BSaturday%252C%2BJune%2B21%252C%2B1958.png)