Peterson, Roger Tory <br/><br/>
A field guide to mexican birds : México, Guatemala, Belize (British Honduras), El Salvador  / 
by Roger Tory Peterson 
 - Estados Unidos de América  :  Houghton Mufflin,  1973 
 - 298 p. 
 - The Peterson field guide series; 20 .
<br/><br/><label>ISBN: </label>0-395-17129-6 
<br/><br/><label>LCCN: </label>162968 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aves--Belice <br/>Aves--El Salvador<br/>Aves--Guatemala <br/>Aves--México 
<br/><br/><label>Dewey Class. No.: </label>598.0723 P48