Field guide to the birds of North America. 

 - 2nd ed. 
 - Washington, D.C. :  National Geographic Society,  1987. 
 - 464 p. :  col. ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0870446924 9780870446924 
<br/><br/><label>LCCN: </label>86033249  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds--Identification.--North America
<br/><br/><label>LC Class. No.: </label>QL681  / .F53 1987 
<br/><br/><label>Dewey Class. No.: </label>598.297