4-6-6-4 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "4-6-6-4" in English language version.

refsWebsite

Global rank English rank

5,798^th place

3,125^th place

2web.archive.org

1^st place

1^st place

1steamlocomotive.com

low place

low place

low place

low place

rrhma.com

"Railroading Heritage of Midwest America - official website". Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved June 12, 2022.

steamlocomotive.com

"Union Pacific 4-6-6-4 "Challenger" Locomotives in the USA". www.steamlocomotive.com. Retrieved 2019-05-08.

trains.com

trains.com

"Work begins on Union Pacific Challenger No. 3985". Trains. Retrieved 2023-01-07.
Glischinski, Steve (April 28, 2022). "Railroading Heritage of Midwest America, Union Pacific agree to donation of Challenger, other locomotives, cars". Trains. Kalmbach Media. Archived from the original on April 28, 2022. Retrieved June 12, 2022.

cs.trains.com

Keefe, Kevin. "The Challenger at high tide". Classic Trains.

web.archive.org

"Railroading Heritage of Midwest America - official website". Railroading Heritage of Midwest America. Archived from the original on April 28, 2022. Retrieved June 12, 2022.
Glischinski, Steve (April 28, 2022). "Railroading Heritage of Midwest America, Union Pacific agree to donation of Challenger, other locomotives, cars". Trains. Kalmbach Media. Archived from the original on April 28, 2022. Retrieved June 12, 2022.