Tolong jelaskan mengenai Great Plain dari American Frontier

Unruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840–1860 (1993)

Billington, Ray Allen. America's Frontier Heritage (1984), a favorable analysis of Turner's theories in relation to social sciences and historiography

Etulain, Richard W., “Clio’s Disciples on the Rio Grande: Western History at the University of New Mexico,” New Mexico Historical Review 87 (Summer 2012), 277–98.

Hurtado, Albert L., “Bolton and Turner: The Borderlands and American Exceptionalism,” Western Historical Quarterly, (Spring 2013) 44#1 pp 5–20.

Limerick, Patricia. The Legacy of Conquest: The Unbroken Past of the American West (1987), attacks Turner and promotes the New Western History