- Willa Cather. O Pioneers! and Other Tales of the Prairie. New York: Doubleday, 1999.
- Census Bureau. "Following the Frontier Line, 1790-1890." 2012. 6/1/2017. <https://www.census.gov/dataviz/visualizations/001/>.
- PBS. "Frontier House: Frontier Life." 6/1/2017. <http://www.pbs.org/wnet/frontierhouse/frontierlife/>.
- Elaine M. Nelson. "Cultural Survival and the Omaha Way." University of Nebraska. 2009. 6/1/2017. <...
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