Sanitation in developing countries : proceedings of a workshop on training held in Lobatse, Botswana, 14-20 August 1980 

 - OttawaCA  IDRC  1980 
 - 172 p. 
<br/><br/> Includes bibliographical references 
<br/><br/><label>Universal Decimal Class. No.: </label>16.04.02 I61