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<br />, <br />~ <br /> <br /> 28. <br />c:;) <br />) <br />It') <br />C-l 29. <br />l_ ~} <br />1:...) <br /> 30. <br /> <br />< '. <br /> <br />~ <br /> <br />Ie <br />,- <br />Jt <br />~ <br />~<- <br /> <br />> <br /> <br />l <br />~ <br />p; <br />l' <br /> <br />, <br />; <br />,,- <br />~ <br />~ <br />f <br /> <br />~ <br />I <br /> <br />i <br />~: <br />1 <br /> <br />~': <br />W <br /> <br />,Ii <br /> <br />Phreatophytes - A Serious Problem in the West, Herllert C. <br />Fletcher and Harold B. El1rendorf, USDA Yearbook of <br />Agriculture, 1955. <br /> <br />Irrigation Methods for Russet Burbank Potatoes, James G. Walker, <br />Colorado Agricultural &q;Jerirnent Station Progress Report, PR 185, <br />July, 1966. <br /> <br />Report on Clearing and Controlling Phreatophytes Cost Data, <br />Division of Irrigation, USDI, Bureau of Reclamation, Region 5, <br />Amarillo, Texas. <br /> <br />31. 1\erial Extent of Phreatophytes and Hydrophytes in the U. S., <br />T. W. Robinson, USGS, Menlo Park, California, 1968. <br /> <br />32 <br /> <br /> <br />