Ferguson, Kitty. <br/><br/>
Prisons of light :  black holes / 
Kitty Ferguson. 
 - Cambridge ;  Cambridge University Press,  1996. 
 - 214 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0521495180 
<br/><br/><label>Subjects--Index Terms: </label>Black holes (Astronomy) 
<br/><br/><label>Dewey Class. No.: </label>523.8/875  / FER