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NW, 1615 L. St; Suite 800Washington; Inquiries, DC 20036USA202-419-4300 | Main202-857-8562 | Fax202-419-4372 | Media. "Religious Landscape Study". Pew Research Center's Religion & Public Life Project. Retrieved September 17, 2022.{{cite web}}: CS1 maint: numeric names: authors list (link)
Binnema, Ted; Dobak, William A. (Fall 2009). ""Like the greedy wolf" : the Blackfeet, the St. Louis fur trade, and war fever, 1807–1831". Journal of the Early Republic. 29 (3): 411–440. doi:10.1353/jer.0.0089. JSTOR40541856. S2CID143630848.
Bentz, Barbara J.; et al. (2010). "Climate Change and Bark Beetles of the Western United States and Canada: Direct and Indirect Effects". BioScience. 60 (8): 602–613. doi:10.1525/bio.2010.60.8.6. S2CID1632906.
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Madej & Jones 2007. Madej, Ed; Jones, Cedron (September 14, 2007). "Mountain Ranges of Montana"(PDF). Natural Resource Information System. Montana State Library. Archived from the original(PDF) on May 15, 2013. Retrieved March 30, 2013.
Swanson 2004. Swanson, Larry (December 2004). "Economics". Montana Fish, Wildlife and Parks. Archived from the original on April 29, 2013. Retrieved April 30, 2013.