Ground water: a threatened resource 

 - Nairobi:  UNEP,  1996 
 - 36 p.  ilustraciones. 
<br/><br/>04682 
<br/><br/>The hydrogeological cycle. Water in aquifers. How groundwater flows. Early uses of groundwater. Where groundwater is used. The advantages of groundwater. Groundwater quality. Inadequate control. The pollution of groundwater. Protecting groundwater resources. Assessing groundwater resources.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua<br/>Contaminación del Agua
<br/><br/><label>Dewey Class. No.: </label>333.91  / U566