Clesceri, Lenore S., Greenberg, Arnold E. and Eaton, Andrew D. <br/><br/>
Standard methods  : for the examination of water and  wastewater 

 - 20th ed. 
 - Usa  ; American Public Health Association  , 1995 
 - xxxvii, various pages 
<br/><br/><label>ISBN: </label>0875532357   
<br/><br/><label>Dewey Class. No.: </label>628.161  / CLE