Arlie O. petters, Harold Levine, Joachim Wambsganss <br/><br/>
Singularity Theory and Gravitattional Lensing 

 - Boston  Birkhauser  2001 
 - Xxiii,603 
<br/><br/><label>ISBN: </label>0-8176-3668-4 
<br/><br/><label>Dewey Class. No.: </label>522.6  / PET