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November 2017 *
November 2016 *
December 2015 *
September 2015 *
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March 2016: OPT had a fantastic set of photos taken to showcase the work of the restored Warren-Bisbee Bus Line Yellow Coach up-close and personal. The photographer, Jude Ignacio, took the pictures for Demion Clinco of the Tucson Historic Preservation Foundation. The Yellow Coach could be nominated to the National Historic Register.
National Bus Trader magazine details the work of the Motor Bus Division of Old Pueblo Trolley, specificaly the restoration of the Warren-Bisbee Bus Line Yellow Coach, in the November 2015 issue. The National Bus Trader is one of America's leading publications for the bus industry.
April 2014 Bus Division Progress Report
A history of the Tucson street railway 1897-1906 Staple Bound - 1998 by W. Eugene Caywood and Keith Glaab.