Dixon, Franklin W.  <br/><br/>
The Disappearing Floor / 

 - New York :  Grosset & Dunlap,   1964. 
 - ix, 176 p. 
 - Hardy Boys Mystery Stories.   19 .
<br/><br/><label>ISBN: </label>044808919x 0448189194 
<br/><br/><label>Dewey Class. No.: </label>823  / DIX