National Geographic field guide to the birds of North America  / 
 Field guide to the birds of North America 
[editores] Jon L. Dunn y Jonathan Alderfer ; mapas Paul Lehman. 
 - 7a ed. revisada y actualizada 
 - Washington (D.C.)  :  National Geographic,  [201 
 - 591 p. 
<br/><br/><label>ISBN: </label>978-1-4262-1835-4 
<br/><br/><label>LCCN: </label>170241 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aves--América del Norte ---- Identificación
<br/><br/><label>Dewey Class. No.: </label>598.07234979 F54