Concepts for national assessment of water availability and use :  report to Congress. 

 - Reston, Va. :  U.S. Geological Survey,  2002. 
 - v, 34 p. :  col. ill., maps,  28 cm. 
 - U.S. Geological Survey circular ;  1223 .
<br/><br/>Includes bibliographical references (p. 28-29). 
<br/><br/><label>ISBN: </label>0607985933 (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water-supply--United States.<br/>Water use--United States.