Ayres Rachel M <br/><br/>
Analysis of waste water for use in agriculture 
Ayres Rachel M; Mara D Duncan 
 - Geneva  World Health Organisation          1996 
 - 31p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural Geography
<br/><br/><label>Dewey Class. No.: </label>U672(J), N6