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<br />~!\,~,,4 59 <br />,_I.....," -" <br /> <br /> <br />UNITED STATES DEPARTMENT OF THE INTERIOR <br />GEOLOGICAL SURVEY <br />WATER RESOURCES DIVISION <br /> <br />RESULTS OF TEST DRILLING AT THE <br /> <br />" <br /> <br />l' <br /> <br />CENTRAL GREAT PLAINS FIELD STATION NEAR AKRON, NORTHEASTERNCOLORAUO <br /> <br />;-, <br /> <br />By <br /> <br />Warren E. Hofstra <br /> <br />. <br /> <br />Prepared in cooperation with the"" <br /> <br />U,S. Department of Agriculture <br /> <br />Agricultural Research Service <br /> <br />Colorado Uistrict <br />Denver. Colorado <br />June 1970 <br />