Bollo, Sarah. <br/><br/>
Mundo secreto 
Sarah Bollo. 
 - [s.l.  s.n.]  1977 
 - 44 p.  20 cm. 
<br/><br/><label>LCCN: </label>78104087  
<br/><br/><label>LC Class. No.: </label>PQ8519.B6  / M8 
<br/><br/><label>Dewey Class. No.: </label>861