Walker, Bryce S.,  <br/><br/>
The great divide :  the American wilderness / 
Bryce S. Walker ; editor Harvey B. Loomis 
 - Canada :  [Publisher not identified],  1973 
 - 184 pages :  colour illustrations ;  26 cm 
<br/><br/>Includes bibliographical references and index  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural history --Rocky Mountains
<br/><br/><label>LC Class. No.: </label>QH104.5 W35