National water quality handbook  water, life's most essential element. 
 Water, life's most essential element 

 - [Washington, D.C.]  U.S. Dept. of Agriculture, Natural Resources Conservation Service  [2003] 
 - 1 v. (various pagings)  ill. (some col.), maps  28 cm. 
<br/><br/> Cover title.  "Issued September 2003 ; 450-VI-NWQH"--P. [2] of cover.  Shipping list no.: 2004-0011-S. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--United States.--Handbooks, manuals, etc.<br/>Water quality management--United States.--Handbooks, manuals, etc.
<br/><br/><label>GPO Item No.: </label>0120-A 
<br/><br/><label>Gov. Doc. Class. No.: </label>A 57.6/2:W 29/2