First world conference on National Parks 
/ United States Department of the Interior 
 - Washington:   United States Department of the Interior,   1962 
 - 471p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical planning
<br/><br/><label>Subjects--Index Terms: </label>National parks 
<br/><br/><label>Universal Decimal Class. No.: </label>712.23  / K2