Swain, Lindsay A.  <br/><br/>
Summary of the Hydrogeology of the Valley and Ridge, Blue Ridge and Piedmont Physiographic Provinces in the Eastern Unites States :  Professional Paper 1422-A. / 
Lindsay A. Swain ; T. O. Mesko ; E. F. Hollyday. 
 - VI. 
 - Reston, [Virginia] :  U.S. Geological Survey,  2004. 
<br/><br/><label>Subjects--Index Terms: </label>გეომორფოლოგია