Ground water quality control and conservation in t 

 - New York   UN           1999 
 - xi, 206p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Irrigation<br/> Underground Water<br/>Industrial Economics
<br/><br/><label>Dewey Class. No.: </label>X9(D24):(G:527).49m.N9, N9/UN