Hansen, Henry A. <br/><br/>
The trumpeter swan in Alaska /  
Henry A. Hansen ....et ..al 
 - [s.l]. :    U. S. Bureau of Sport Fisheries Wildlife,    1971. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Trumpeter swan.
<br/><br/><label>Dewey Class. No.: </label>636.598