Williams.G.P. <br/><br/>
WASHINGTON, D.C.'S  VANISHING SPRINGS AND WATERWAYS 

 - United States Department of the Interior  USA  1977 
 - 19p.  ILL.,Cht.,Fig and Table 
 - GEOLOGICAL SURVEY CIRCULAR   752 .
<br/><br/><label>Nat. Bib. No.: </label>4536 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>627.12  / WIL