Johnsgard, Paul A. <br/><br/>
Handbook of waterfowl behavior. 

 - London :  Cornell University Press,  [1965 (1976)] 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anatidae.<br/>Birds -- Behavior.--Birds -- Behavior.