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<br />o <br />f'- <br />lJ":i <br />C\J <br />C <br /> <br />UNITED STATES <br />DEPARTMENT OF THE INTERIOR <br />HAROLD L. ICKES, Secretary <br /> <br />BUREAU OF RECLH1ATIO;\, <br />JOH~ C. PAGE, Commissioner <br />S. O. HARPER, Chief Engineer <br /> <br />BOULDER CANYON PROJECT <br />FINAL REPORTS <br /> <br />PART VII-CEMENT AND CONCRETE INVESTIGATIONS <br /> <br />Bulletin 1 <br /> <br />THERMAL PROPERTIES OF CONCRETE <br /> <br /> <br />DENVER, COLORADO <br />1940 <br />