Ioli, Elena <br/><br/>
MYSTERIOUS BLACK HOLE / 
ELENA IOLI ; Illustrated by Franco Grazioli 
 - 72 pages :  illustrations ;  20 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9789811230875  RM 32.90 9789811233289  RM 59.90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Black holes (Astronomy)
<br/><br/><label>Dewey Class. No.: </label>505