Dixon, Franklin W. <br/><br/>
The secret panel /​ 
by Franklin W. Dixon 
 - New York  Grosset & Dunlap,  1974 
 - 178p. :  ill. ;  19cm. 
 - The Hardy Boys mystery stories ;  25 .
 - The Hardy Boys mystery stories ;  25 .
<br/><br/><label>ISBN: </label>0448089254 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English fiction--Children's stories
<br/><br/><label>Dewey Class. No.: </label>F DIX