The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60
References
^ John Unruh (1993). The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60, University of Illinois Press. ISBN 9780252063602 (revised May 2012)^ John Unruh (1993). The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60, University of Illinois Press. ISBN 9780252063602 (revised May 2012)
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