Zwinger, Ann          frey50        <br/><br/>
Land Above the Trees: A Guide to American Alpine 

 -  Harper & Row  1972 
<br/><br/><label>ISBN: </label>0-8165-1110-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mountain ecology--United States<br/>Alpine flora--United States