Guidance on safeguarding the quality of public water suppliers. 

 - London :  HMCO,  1990. 
 - 108 p. ;  21 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0117522627 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality.<br/>Water quality.