Hammitt, William E. <br/><br/>
Wildland recreation  ecology and management 
William E. Hammitt, David N. Cole 
 - New York  John Wiley & Sons  1987 
 - 341 p. : ill. ; 22 cm. 
<br/><br/><label>ISBN: </label>0471872911 
<br/><br/><label>LCCN: </label>86-23403 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wilderness areas--United States--Recreational use--Management<br/>Wilderness areas--Environmental aspects--United States