Kalbermatten J M, Julius D S, Gunnerson C.G. <br/><br/>
A summary of technical and economic options. 

 - 36p. 
 - (Appropriate technology for water supply and sanitation ; v. 1-A) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water supply--Economics<br/>Sanitation--Economics<br/>Technology, appropriate