Blyton, Enid <br/><br/>
Secret seven  : Secret seven on the trail / 

 - London:   Hodder children's books:   2015. 
 - 114 p. 
<br/><br/><label>ISBN: </label>9780340893104 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English fiction 
<br/><br/><label>Dewey Class. No.: </label>823.01  / BLY-S