Water resources of hard rock aquifers in arid and semi-arid zones / edited by J.W. Lloyd 

 - Paris: Unesco.,  1999 
 - 284p; illust. 30cm 
 - Studies and reports in hydrology no; 58 .
<br/><br/><label>ISBN: </label>9231035118 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water resources -- Aquifers.