"1978 Montana Federal-Aid Road Log"(PDF). Helena, Montana: Montana Department of Highways, Planning and Research Bureau. 1978. pp. 22, 109. Retrieved December 20, 2018 – via Archive.org.
"Federal-Aid Road Log"(PDF). Helena: Montana Highway Department. January 1, 1943. p. 57. Retrieved December 20, 2018 – via Archive.org.