Snow, David W. <br/><br/>
The web of adaptation :  birds studies in the American tropics. 

 - London :  Collins,  [1976] 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds -- Study and teaching.--Birds -- Study and teaching.<br/>Ornithology -- Study and teaching.--Ornithology -- Study and teaching.