Walker, Jeffrey S. <br/><br/>
Case study of the effects of longwall mining induced subsidence on shallow ground water sources in the Northern Appalachian Coalfield 
Walker, Jeffrey S. 
 - Washington  Bureau of mines  1988 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTUDIOS DEL CASO<br/>MINERIA
<br/><br/><label>Universal Decimal Class. No.: </label>622