Franklin W. Dixon <br/><br/>
HARDY BOYS : THE SECRET OF SIGMA SEVEN 

 - 0 
 -  Pocket Books  1991/01/01 
 -  149 
<br/><br/><label>Source: </label> Purchase  Nil  Pai & Co. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nil
<br/><br/><label>Dewey Class. No.: </label>CS-F