"Fang, Li. Zhi" <br/><br/>
"Galaxies, Quasars and Co" 

 - New Delhi  World Scientific Pub.  1985 
 - vii-221 
<br/><br/><label>ISBN: </label>9971978938 
<br/><br/><label>Dewey Class. No.: </label>521  / 582 GA