org/Counties/Pages/FindACounty.aspx 2011年6月7日閲覧。 ^ NorthDakota government county history page ^ “Traill County, NorthDakota”. January 30, 2012閲覧。 ^ National Park
System Development and Reform: A Process. Grand Forks, NorthDakota: University of NorthDakota. http://www.und.edu/dept/linguistics/theses/2006Karan.PDF
2011年6月7日閲覧。 ^ “Sheridan County - Main Page”. 5 May 2011閲覧。 ^ “County History”. Official Portal for NorthDakota State Government. 4 May 2011閲覧。 ^ “Census
America; South Dakota)." Weishampel, et al. (2004). Page 586. ^ a b c d "Dinosaur distribution (Late Cretaceous; North America; NorthDakota)." Weishampel
Center, Columbia University, the Cathedral of St. John the Divine, the Dakota Apartments, and Zabar's food emporium, the Upper West Side stretches from