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REFERENCES
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1.    Roosa. D. M. and Runkel, S. T. (1989) Wildflowers of the tallgrass prairie:  The upper midwest Ames, Iowa: Iowa State univestity Press

2.    Kannowski, P. B. (1989).  Wildflowers of North Dakota.  Grand Forks, ND: University of North Dakota Press.

3.    Kindscher, K.  (1992).  Medicinal plants of the prairie: An ethnobotanical guide.  Lawrence, KS:  University of Kansas Press.

4.    Shirley, S.  (1994).  Restoring the tallgrass prairie: An illustrated manual for Iowa and the upper midwest.  Iowa City:  University of Iowa Press.

5.    www.ct-botanical-society.org

6.    www.forestry.org

7.    www.npwrc.usgs.gov

8.    www.greatplains.gov

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