Udvardy, Miklos D.F. <br/><br/>
The Audubon Society field guide of North American birds  : Western region 
/ Miklos D.F. Udvardy 
 - New York  : Alfred A. Knopf  , c1977. 
 - 855 p.  : il  :  fot. 
<br/><br/><label>ISBN: </label>0-394-41410-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds---North America
<br/><br/><label>Dewey Class. No.: </label>598.2 UDV