See J. C. Olson, History of Nebraska (2d ed. 1966, repr. 1974); M. P. Lawson and R. E. Lonsdale, Economic Atlas of Nebraska (1977); D. W. Creigh, Nebraska: A History (1977); Nebraska (1985), "Geographies of the United States" series.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.