Dixon, Franklin W. <br/><br/>
The melted coins  Hardy Boys 48: 

 - New York  Grosset & Dunlap  1969 
 - 180 
 - (The Hardy Boys) .
<br/><br/><label>ISBN: </label>9780448089232 
<br/><br/><label>Dewey Class. No.: </label>823  / DIX