Dixon, Franklin W. <br/><br/>
Shattered helmet: Hardy boys mystery stories 52    

 - New York:  Grosset & Dunlap,  1973. 
 - 180p.:  ill.;  20cm. 
 - Hardy boys  52. .
<br/><br/><label>ISBN: </label>9780448089522 
<br/><br/><label>Dewey Class. No.: </label>813.54  / DIX