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<br />~-1 <br />;J <br />::J <br /> <br />;j <br />ij <br /> <br />'~1 <br /> <br />.' <br /> <br />~-; <br /> <br />PROBLEMS OF THE <br />UPPER RIO GRANDE <br /> <br />An <br /> <br />Arid Zone River <br /> <br />Special symposium and discussion group <br />of the <br />INTERNATIONAL ARID LANDS SYMPOSIUM AND CONFERENCE <br /> <br />held in 1955 at the <br /> <br />University of New Mexico and the <br />New Mexico Institute of Mining & Technology <br /> <br />I' <br />, ' <br /> <br />sponsored by the <br /> <br />American Association for the Advancement of Science <br />in cooperation with UNESCO <br /> <br />Chairman <br /> <br />A. N. Soyre <br /> <br />PUBLICATION NO.1 <br />U. S. Commission for Arid Resource <br />Improvement and Development <br />ARID 1957 <br /> <br />Eoit.o by <br />Peter C. Duisberg <br /> <br />~-\ ; I '"; --: . <br />\,,' ...'.........; <br /> <br />/------------"', <br />