Commisson for Tech. Co-operation in Africa South of Sahara. <br/><br/>
CSA Specialist meeting on water treatment pretoria 12-17, 9, Pub. No.64   

 - Sahara  Jt. Secretariat C.C.T.A.  1960 
 - 332p 
<br/><br/><label>Dewey Class. No.: </label>628.16  / N621