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6.0 LITERATURE CITED <br />Harrington, H.D. 1954 Manual of the Plants of Colorado. Sage Books. Denver <br />Stubbendieck, J., G.Y. Friisoe, and M.R. Bolick. 1995. Weeds of Nebraska and the Great <br />Plains. Nebraska Department of Agriculture. <br />Weber, William A. 1990. Colorado Flora: Eastern Slope. University of Colorado Press <br />Whitson, Tom D. Editor. 1987. Weeds and Poisonous Plants of Wyoming and Utah. <br />Cooperative Extension Service, College of Agriculture, The University of Wyoming <br />Zimdahl, Robert L. 1990. Weeds of Colorado. Cooperative Extension, Colorado State <br />University Bulletin 521 A <br />Oakridge Energy, Inc. Carbon Junction Mine Page 8 <br />2014 Proposed Pryland Reference Area Report <br />