Mara, D. Duncan    1944- <br/><br/>
Appropriate sanitation alternatives for low-income communities :    a brief introduction /  
D. Mara. 
 - Washington D. C. :    The World Bank,    1982. 
 - iii, 50 p. :    ill. ;    28 cm. 
<br/><br/>Includes bibliography : p. 49-50. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Water- supply<br/> Sanitation.