Fifth biennial report on water resources development . 

 - New York  United Nations          1968 
 - 126p  cm. 
<br/><br/> Supp. no. 3 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(D24):77.IN45.N68, K7  UN