Owls of the world;  their evolution, structure, and ecology. 
Edited by John A. Burton [with contributions by] Philip Burton [and others] Illustrated by John Rignall. 
 - [1st American ed.] 
 - New York,  Dutton,  1973. 
 - 216 p.  col. illus.  28 cm. 
<br/><br/><label>ISBN: </label>052517432X 
<br/><br/><label>LCCN: </label>73008271  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Corujas
<br/><br/><label>LC Class. No.: </label>QL696.S8  / O9 1973 
<br/><br/><label>Dewey Class. No.: </label>598.97