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<br />U. S. Department of Commerce, Weather Bureau, Technical <br />Paper No. 40, Rainfall Frequency Atlas of the United <br />States: For Durations from 30 Minutes to 24 Hours <br />and Return Periods from 1 to 100 Years, May 1961 <br /> <br />U. S. Geological Survey, Colorado Water Resources <br />Basic Data Release No. 27, Rainfall-Runoff Data from <br />Small Watersheds in Colorado, June 1968 Through September, <br />1971, in Cooperation with the Urban Drainage and Flood <br />Control District and the Colorado Department of Highways, <br />Denver, Colorado, 1972 <br /> <br />U. S. Department of the Interior, Geological Survey, <br />Water Resources Data for Colorado, Part I, Surface <br />Water Records, Prepared in Cooperation with the State <br />of Colorado, Denver, Colorado, 1972 <br /> <br />------------ Water Supply Paper 997, Floods in Colorado, <br />R. Follansbee and L. R. Sawyer, Washington, D. C., <br />1948 <br /> <br />------------, Water Supply Paper 1921, Surface Water <br />Supply of the United States 1961-65 - Part 7 Lower <br />Mississippi Basin - Volume 2, Arkansas River Basin <br />Washington, D. C. 1969 <br /> <br />Wright - McLaughlin Engineers, Volumes I and II, Urban <br />Storm Drainage Criteria Manual, Denver, Colorado, <br />March 1969 <br /> <br />34 <br />