Blyton , Enid  <br/><br/>
The riddle of the hollow tree :  

 - Award :   London ;  2009. 
 - 219 p ;  21 cm .  01 
 - 2025-07-09 
<br/><br/><label>ISBN: </label>9781841357409 
<br/><br/><label>Nat. Bib. No.: </label>0011403 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>BLY 
<br/><br/><label>Universal Decimal Class. No.: </label>823