The Animal world  a unit of study. 

 - Chicago  World Book  1986. 
 - 158 p.  col., ill. 
 - World Book encyclopedia of science .
<br/><br/> Includes index. 
<br/><br/><label>LCCN: </label>86707950 /F 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology--Juvenile films.<br/>Zoology
<br/><br/><label>Dewey Class. No.: </label>591