"Historic Inn to Receive Rail Service". The Spokesman-Review. Spokane, Washington. March 10, 1985. p. 35. Retrieved October 19, 2019 – via Newspapers.com.
"Essex Inn Amtrak Flag Stop". The Independent-Record. Helena, Montana. November 12, 1985. p. 11. Retrieved October 19, 2019 – via Newspapers.com.
umt.edu
itrr.umt.edu
Grau, Kara; Bruns-Dubois, Melissa; Nickerson, Norma P. (December 2006). "The Economic Review of the Travel Industry in Montana"(PDF). Institute for Tourism and Recreation Research at the University of Montana. Archived from the original(PDF) on 2013-12-30. Retrieved 2007-02-01.
web.archive.org
Grau, Kara; Bruns-Dubois, Melissa; Nickerson, Norma P. (December 2006). "The Economic Review of the Travel Industry in Montana"(PDF). Institute for Tourism and Recreation Research at the University of Montana. Archived from the original(PDF) on 2013-12-30. Retrieved 2007-02-01.