Dixon, Franklin W. <br/><br/>
Hunting for hidden gold  Hardy Boys 33: 

 - New York  Grosset & Dunlap  1954 
 - 176 
 - (The Hardy Boys) .
<br/><br/><label>ISBN: </label>9780448089058 
<br/><br/><label>Dewey Class. No.: </label>823  / DIX