Mara, Duncan  & Cairncross, Sandy <br/><br/>
Guidelines for the safe use of wastewater and excreta in agriculture and aquaculture : measures for public health protection 

 - World Health Organisation, Geneva  1989 
 - vii; 187 
<br/><br/><label>ISBN: </label>92-4-154248-9 
<br/><br/><label>Dewey Class. No.: </label>363.728 Mar/Cai