Hammad Hammad Y. <br/><br/>
Ground water potentialities in the African Sahara and the nile valley 

 -  1970 
 - 112p.  cm. 
<br/><br/><label>Standard No.: </label>243,791 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>G955:12.6.1215, L0