Proceedings 

 - New York  United Naitons USA         1976 
 - iv, 134p.  cm. 
 - United Nations Water resources series .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engneering
<br/><br/><label>Dewey Class. No.: </label>X9(D2):27p4,N75, L6/UN