Baer, Christopher T. (June 2005). "PRR CHRONOLOGY: 1972"(PDF). Pennsylvania Technical and Historical Society. Archived from the original(PDF) on August 25, 2012.
Baer, Christopher T. (June 2005). "PRR CHRONOLOGY: 1972"(PDF). Pennsylvania Technical and Historical Society. Archived from the original(PDF) on August 25, 2012.
Nixon, Amy Ash (March 31, 1997). "End Of The Line?". Hartford Courant. Archived from the original on July 31, 2013. Retrieved August 5, 2012.