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<br /> <br />nnSll <br /> <br />UNITED STATES <br />DEPARTMENT OF THE INTERIOR <br />GEOLOGICAL SURVEY <br /> <br />WATER-LEVEL CHANGES 1964-71 <br />NORTHERN HIGH PLAINS OF COLORADO <br /> <br />By <br /> <br />Warren E. Hofstra, John M. Klein, and Thomas J. Major <br /> <br />'., ~:. <br /> <br />.....,... <br />'.,;";". <br />~. <br /> <br />OPEN-FILE REPORT <br />71004 <br /> <br />.". . <br />. ", . <br /> <br />WATER <br />RESOURCES <br />DIVISnON <br /> <br />"'. <br /> <br />~. .......:. <br />-." .... <br />r:.;.;.... <br />...:.... <br /> <br />"'1 <br /> <br />I <br /> <br />Colorado District <br />Denver, Colorado <br />October 1971 <br /> <br />i ~~i~~~[t~i~:.~~T':,/" <br />