Editing Northern Pacific Railway (section)

===Primary sources and official sources===
* Campbell, Marius Robinson. ''[https://web.archive.org/web/20061008114447/http://www.cr.nps.gov/history/online_books/geology/publications/bul/611//index.htm Guidebook of the Western United States, Part A: The Northern Pacific Route, with a side trip to Yellowstone Park].'' Washington (D.C.): Government Printing Office, 1915.
*{{Cite book
 | last=Cleland
 | first=Alexander M.
 | year= 1913
 | title= Land of Geysers, Yellowstone National Park
 | place= St. Paul [Minn.]
 | publisher= General Passenger Department, Northern Pacific Railway
 | url= https://archive.org/details/landofgeysersyel00nort}}

*{{Cite book
 | last= Northern Pacific Railway Company.
 | year= 1899
 | title= The Official Northern Pacific Railway guide
 | place= St. Paul, Minn.
 | publisher= W.C. Riley
 | url= https://archive.org/details/officialnorthern00nortrich}}
*{{Cite book
 | last= Northern Pacific Railway Company.
 | year= 1911
 | title= Lewiston-Clarkston and the Clearwater Country, Idaho—Washington
 | publisher= General Passenger Department, Northern Pacific Railway
 | url= https://archive.org/details/lewistonclarksto00nort}}