Union Pacific Challenger (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Union Pacific Challenger" in English language version.

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books.google.com

"Union Pacific's 40th Anniversary Steam Excursion DVD". Pentrex. Archived from the original on May 11, 2017. Retrieved June 14, 2019.

"Railroading Heritage of Midwest America - official website". Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved April 28, 2022.

Glischinski, Steve (April 28, 2022). "Railroading Heritage of Midwest America, Union Pacific agree to donation of Challenger, other locomotives, cars". Trains. Kalmbach Publishing. Archived from the original on April 28, 2022. Retrieved April 28, 2022.
"Union Pacific's 40th Anniversary Steam Excursion DVD". Pentrex. Archived from the original on May 11, 2017. Retrieved June 14, 2019.
"Railroading Heritage of Midwest America - official website". Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved April 28, 2022.