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• References <br />Harrington, H. D. 1964. Manual of the plants of Colorado. Sage Books. The <br />Swallow Press, Inc. Chicago. 666p. <br />Mueller-Dombois, D. and H. Ellenberg. 1974. Aims and methods of vegetation <br />ecology. John Wiley and Sons. New York. 547p. <br />Welsh, 5. L. and G. Moore. 1973. Utah plants. Brigham Young University Press, <br />Provo, Utah. 474p. <br />• <br />~J <br />231 <br />