ما هو عدد ولايات الإقليم الغرب الأوسط الأمريكي؟
ولايات الغرب الأمريكية
Beck, Warren A., Haase, Ynez D.; Historical Atlas of the American West. University of Oklahoma Press, Oklahoma, 1989. ISBN 0-8061-2193-9
Lamar, Howard. The New Encyclopedia of the American West. Yale University Press, 1998. ISBN 0-300-07088-8
Milner II, Clyde A; O'Connor, Carol A.; Sandweiss, Martha A. The Oxford History of the American West. مطبعة جامعة أكسفورد; Reprint edition, 1996. ISBN 0-19-511212-1
Phillips, Charles; Axlerod, Alan; editor. The Encyclopedia of the American West. Simon & Schuster, New York, 1996. ISBN 0-02-897495-6
Pomeroy, Earl. The American Far West in the twentieth century (2008) 570 pages; comprehensive scholarly history
White, Richard. "It's Your Misfortune and None of My Own"": A New History of the American West. University of Oklahoma Press; Reprint edition, 1993. ISBN 0-8061-2567-5