America's outdoor wonders 
prepared by National Geographic Society (U.S.), Special Publications Division. 
 - Washington, D.C.  National Geographic Society  1987. 
 - 199 p.  col. ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>087044624X  donacion 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parks--United States.<br/>Recreation areas--United States.
<br/><br/><label>LC Class. No.: </label>E160  / .A58 1987