"Blyton,  Enid" <br/><br/>
Secret  Seven  On  The  Trail 

 - London  Hodder Childrens B  2000 
 - 137 
<br/><br/><label>ISBN: </label>0-340-68094-6 
<br/><br/><label>Dewey Class. No.: </label>F823  / 2690