Blyton , Enid  <br/><br/>
The o' sullivan twins :  

 - Egmont :   London ;  1942. 
 - 183 p ; 21 cm .  1 
 - 2025-05-26 
<br/><br/><label>ISBN: </label>1405228733 
<br/><br/><label>Nat. Bib. No.: </label>0011212 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>BLY 
<br/><br/><label>Universal Decimal Class. No.: </label>823