Mara, D. Duncan (David Duncan),  1944- <br/><br/>
Sewage treatment in hot climates / 
Duncan Mara 
 - Oxford :  English Language Book Society,  1978. 
 - 168 p. ;  28 cm. 
<br/><br/><label>ISBN: </label>0471996157 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Tropical conditions.