Sparks, John. <br/><br/>
Owls  their natural and unnatural history 
[by] John Sparks and Tony Soper. Illustrated by Robert Gillmor. 
 - New York  Taplinger Pub. Co.  [1970] 
 - 206 p.  illus.  22 cm. 
<br/><br/>Bibliography: p. [198]-201. 
<br/><br/><label>ISBN: </label>0800861701 
<br/><br/><label>LCCN: </label>76126994  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Owls
<br/><br/><label>LC Class. No.: </label>QL696.S8  / S67 
<br/><br/><label>Dewey Class. No.: </label>598.9/7