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• <br />LITERATURE CITED <br />15.) Pasto, Jerome K., John R. Allison, and John B. Washko. 1957. Ground cover <br />and height of sward as a means of estimating pasture production. <br />Agron. Jour. 49:407-409 <br />16.) Payne, G.F. 1974. Cover -weight relationships. J. Range Mngt. <br />27:403-404. <br />17.) Peet, R.R. 1974. The measurement of species diversity. Ann. Rev. <br />Ecol. Syst. 5:285-307. <br />18.) Pielou, E.C. 1966. The measurement of diversity in different types of <br />biological collections. J. Theor. Biol. 13:131-144. <br />19.) Smith, Dwight R., Pat 0. Currie, Joseph V. Basile, and Neil C. <br />Frischknecht. 1962. Methods for measuring; forage utiliza- <br />tion and differentiating use by different classes of animals. <br />In. Range Research Methods. U.S.D.A. Misc. Pub. No. 940. 172p <br />20.) Whittaker, R.H. 1960. Vegetation of the Siskiyou Mountains, Oregon and <br />California. Ecol. Monogr. 30:279-338. <br />21.) <br />Whittaker, R.H. <br />1970. Communities <br />and Ecosystems <br />Canada, Ltd. <br />Toronto, Canada. <br />22.) <br />Whittaker, R.H. <br />1975. Communities <br />and Ecosystems <br />-17- <br />Collier-MacMillan, <br />MacMillan, New York <br />