Groundwater legislation in the ECE region 

 -  1986 
 - VP  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology
<br/><br/><label>Dewey Class. No.: </label>U22:(Z).5.N8, M6