Conference on world water resources at the begning of the 21st centuary, Water   a looming crisis. Edited by H. Zebidi. (Unesco, Paris 

 - Paris  Unesco France         1999 
 - 536p.  cm. 
 - Technical documents in hydrology. No. 18.; IHP-V .
<br/><br/> International hydrological programme. 
<br/><br/><label>Standard No.: </label>28811 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICAL GEOGRAPHY
<br/><br/><label>Dewey Class. No.: </label>U295p1,N98, N9