Dixon, Franklin W.  <br/><br/>
The Secret Panel / 

 - New York :  Grosset & Dunlap,   1946. 
 - vii, 178 p.  
 - Hardy Boys Mystery Stories.   25 .
<br/><br/><label>ISBN: </label>0448089254 0448189259 
<br/><br/><label>Dewey Class. No.: </label>823  / DIX