Physical and chemical characteristics of Knowles, Forgotten, and Moqui Canyons, and effects of recreational use on water quality, Lake Powell, Arizona and Utah 
by R.J. Hart ... [et al.] ; prepared in cooperation with the Glen Canyon National Recreation Area. 
 - Reston, Va.  U.S. Geological Survey  2005. 
 - viii, 43 p.  col. ill., col. maps  28 cm.  1 CD-ROM (4 3/4 in.) 
 - Scientific investigations report  2004-5120 .
<br/><br/> Shipping list no.: 2005-0109-P.  CD-ROM contains tables 10-14.  CD-ROM available at the Reference Collection: R 363.73940979259 P5781 CD. 
<br/><br/>Includes bibliographical references (p. 40-43). 
<br/><br/>
<br/><br/><br/>System requirements: Computer system with CD-ROM drive; Adobe Acrobat Reader 4.0 or greater. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution--Powell, Lake (Utah and Ariz.)<br/>Water quality--Powell, Lake (Utah and Ariz.)
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Powell, Lake Utah and Ariz.--Recreational use--Environmental aspects.
<br/><br/><label>GPO Item No.: </label>0624-B-02 0624-B-02 (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.42/4-4:2004-5120