Martin, Michael. <br/><br/>
Crop circles / 
by Michael Martin. 
 - Mankato, Minn. :  Capstone Press,  c2006. 
 - 32 p. :  ill. (chiefly col.) ;  24 cm. 
 - Edge Books. The unexplained .
<br/><br/>Includes bibliographical references (p. 31) and index. 
<br/><br/><label>ISBN: </label>9780736843812 (reinforced library binding) 0736843817 (reinforced library binding) 
<br/><br/><label>LCCN: </label>2005018486 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop circles.
<br/><br/><label>LC Class. No.: </label>AG243  / .M3525 2006 
<br/><br/><label>Dewey Class. No.: </label>001.94